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Howard An

TitleProfessor
InstitutionRush University, Rush Medical College
DepartmentOrthopedic Surgery
Address1611 W. Harrison St.
Chicago IL 60612
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    Collapse Overview 
    Collapse overview
    My Scopus ID is 7202277351.
    My NIH COMMONS name is HAN123.


    Collapse Bibliographic 
    Collapse selected publications
    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.
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    1. Yang SH, Espinoza Orías AA, Pan CC, Senoo I, Andersson GBJ, An HS, Inoue N. Spatial geometric and magnetic resonance signal intensity changes with advancing stages of nucleus pulposus degeneration. BMC Musculoskelet Disord. 2017 Nov 21; 18(1):473. PMID: 29162082.
      View in: PubMed
    2. Saifi C, Bernhard J, Shillingford JN, Petridis P, Robinson S, Guo XE, Weidenbaum M, Lehman RA, An HS, Lenke LG, Vunjak-Novakovic G, Laratta JL. Tissue Engineered Bone Differentiated From Human Adipose Derived Stem Cells Inhibit Posterolateral Fusion in an Athymic Rat Model. Spine (Phila Pa 1976). 2017 Aug 14. PMID: 28816826.
      View in: PubMed
    3. Basques BA, Espinoza Orías AA, Shifflett GD, Fice MP, Andersson GB, An HS, Inoue N. The Kinematics and Spondylosis of the Lumbar Spine Vary Depending on the Levels of Motion Segments in Individuals With Low Back Pain. Spine (Phila Pa 1976). 2017 Jul 01; 42(13):E767-E774. PMID: 27831966.
      View in: PubMed
    4. Louie PK, Presciutti SM, Iantorno SE, Bohl DD, Shah K, Shifflett GD, An HS. There is no increased risk of adjacent segment disease at the cervicothoracic junction following an anterior cervical discectomy and fusion to C7. Spine J. 2017 Sep; 17(9):1264-1271. PMID: 28456670.
      View in: PubMed
    5. Louie PK, Paul JC, Markowitz J, Bell JA, Basques BA, Yacob A, An HS. Stability-preserving decompression in degenerative versus congenital spinal stenosis: demographic patterns and patient outcomes. Spine J. 2017 Oct; 17(10):1420-1425. PMID: 28456675.
      View in: PubMed
    6. Chou PH, Lin HH, An HS, Liu KY, Su WR, Lin CL. Could the Topping-Off Technique Be the Preventive Strategy against Adjacent Segment Disease after Pedicle Screw-Based Fusion in Lumbar Degenerative Diseases? A Systematic Review. Biomed Res Int. 2017; 2017:4385620. PMID: 28321409.
      View in: PubMed
    7. Liu W, Liu D, Zheng J, Shi P, Chou PH, Oh C, Chen D, An HS, Chee A. Annulus fibrosus cells express and utilize C-C chemokine receptor 5 (CCR5) for migration. Spine J. 2017 May; 17(5):720-726. PMID: 28108404.
      View in: PubMed
    8. Choi Y, Jiang F, An H, Park HJ, Choi JH, Lee H. A pharmacogenomic study on the pharmacokinetics of tacrolimus in healthy subjects using the DMETTM Plus platform. Pharmacogenomics J. 2017 01; 17(1):105-106. PMID: 27958377.
      View in: PubMed
    9. Yildirim B, Puvanesarajah V, An HS, Novicoff WM, Jain A, Shen FH, Hassanzadeh H. Lumbosacral Epidural Lipomatosis: A Retrospective Matched Case-Control Database Study. World Neurosurg. 2016 Dec; 96:209-214. PMID: 27609448.
      View in: PubMed
    10. Shi P, Chen EY, Cs-Szabo G, Chee A, Tannoury C, Qin L, Lin H, An S, An HS, Zhang Y. Biglycan Inhibits Capsaicin-Induced Substance P Release by Cultured Dorsal Root Ganglion Neurons. Am J Phys Med Rehabil. 2016 Sep; 95(9):656-62. PMID: 26945213; PMCID: PMC4990466 [Available on 09/01/17].
    11. Ellman MB, Kim J, An HS, Chen D, Kc R, Li X, Xiao G, Yan D, Suh J, van Wijnen AJ, Wang JH, Kim SG, Im HJ. Corrigendum to "Lactoferricin enhances BMP7-stimulated anabolic pathways in intervertebral disc cells" [Gene. 2013 Jul. 25; 524(2):282-91]. Gene. 2017 Feb 20; 602:61. PMID: 27354310.
      View in: PubMed
    12. Zhou J, Espinoza Orías AA, Kang X, He J, Zhang Z, Inoue N, An HS. CT-based morphometric analysis of the occipital condyle: focus on occipital condyle screw insertion. J Neurosurg Spine. 2016 Nov; 25(5):572-579. PMID: 27341056.
      View in: PubMed
    13. Zhang Y, Chee A, Shi P, Adams SL, Markova DZ, Anderson DG, Smith HE, Deng Y, Plastaras CT, An HS. Intervertebral Disc Cells Produce Interleukins Found in Patients with Back Pain. Am J Phys Med Rehabil. 2016 Jun; 95(6):407-15. PMID: 26495812; PMCID: PMC4841745 [Available on 06/01/17].
    14. Chee A, Shi P, Cha T, Kao TH, Yang SH, Zhu J, Chen D, Zhang Y, An HS. Cell Therapy with Human Dermal Fibroblasts Enhances Intervertebral Disk Repair and Decreases Inflammation in the Rabbit Model. Global Spine J. 2016 Dec; 6(8):771-779. PMID: 27853661.
      View in: PubMed
    15. Espinoza Orías AA, Mammoser NM, Triano JJ, An HS, Andersson GB, Inoue N. Effects of Axial Torsion on Disc Height Distribution: An In Vivo Study. J Manipulative Physiol Ther. 2016 05; 39(4):294-303. PMID: 27059249; PMCID: PMC4864143 [Available on 05/01/17].
    16. An HS. Influence of graft size for anterior discectomy and fusion in flexion-distraction injuries. Spine J. 2016 04; 16(4):530. PMID: 27173906.
      View in: PubMed
    17. Oh CD, Im HJ, Suh J, Chee A, An H, Chen D. Rho-Associated Kinase Inhibitor Immortalizes Rat Nucleus Pulposus and Annulus Fibrosus Cells: Establishment of Intervertebral Disc Cell Lines With Novel Approaches. Spine (Phila Pa 1976). 2016 Mar; 41(5):E255-61. PMID: 26693672; PMCID: PMC4769661 [Available on 03/01/17].
    18. Choi Y, Jiang F, An H, Park HJ, Choi JH, Lee H. A pharmacogenomic study on the pharmacokinetics of tacrolimus in healthy subjects using the DMETTM Plus platform. Pharmacogenomics J. 2017 Mar; 17(2):174-179. PMID: 26882121.
      View in: PubMed
    19. Park SY, An HS, Lee SH, Suh SW, Kim JL, Yoon SJ. A prospective randomized comparative study of postoperative pain control using an epidural catheter in patients undergoing posterior lumbar interbody fusion. Eur Spine J. 2016 May; 25(5):1601-1607. PMID: 26787345.
      View in: PubMed
    20. An H, Marron JS, Schwartz TA, Renner JB, Liu F, Lynch JA, Lane NE, Jordan JM, Nelson AE. Novel statistical methodology reveals that hip shape is associated with incident radiographic hip osteoarthritis among African American women. Osteoarthritis Cartilage. 2016 Apr; 24(4):640-6. PMID: 26620089; PMCID: PMC4799754 [Available on 04/01/17].
    21. Obstructive Hydrocephalus Due to Intraventricular Hemorrhage Following Incidental Durotomy during Lumbar Spine Surgery. Spine (Phila Pa 1976). 2015 Jul 22. PMID: 26208226.
      View in: PubMed
    22. Zhang Y, Chee A, Shi P, Wang R, Moss I, Chen EY, He TC, An HS. Allogeneic Articular Chondrocyte Transplantation Downregulates Interleukin 8 Gene Expression in the Degenerating Rabbit Intervertebral Disk In Vivo. Am J Phys Med Rehabil. 2015 Jul; 94(7):530-8. PMID: 25133623; PMCID: PMC4329109.
    23. Park SY, An HS, Moon SH, Lee HM, Suh SW, Chen D, Jeon JH. Neuropathic Pain Components in Patients with Lumbar Spinal Stenosis. Yonsei Med J. 2015 Jul; 56(4):1044-50. PMID: 26069129; PMCID: PMC4479834.
    24. Kim JS, Ali MH, Wydra F, Li X, Hamilton JL, An HS, Cs-Szabo G, Andrews S, Moric M, Xiao G, Wang JH, Chen D, Cavanaugh JM, Im HJ. Characterization of degenerative human facet joints and facet joint capsular tissues. Osteoarthritis Cartilage. 2015 Dec; 23(12):2242-2251. PMID: 26117175; PMCID: PMC4663154 [Available on 12/01/16].
    25. Munns JJ, Lee JY, Espinoza Orías AA, Takatori R, Andersson GB, An HS, Inoue N. Ligamentum flavum hypertrophy in asymptomatic and chronic low back pain subjects. PLoS One. 2015; 10(5):e0128321. PMID: 26010138; PMCID: PMC4444243.
    26. Zhu Y, Liu H, Xu L, An H, Liu W, Liu Y, Lin Z, Xu J. p21-activated kinase 1 determines stem-like phenotype and sunitinib resistance via NF-?B/IL-6 activation in renal cell carcinoma. Cell Death Dis. 2015 Feb 12; 6:e1637. PMID: 25675297; PMCID: PMC4669810.
    27. Scanzello CR, Markova DZ, Chee A, Xiu Y, Adams SL, Anderson G, Zgonis M, Qin L, An HS, Zhang Y. Fibronectin splice variation in human knee cartilage, meniscus and synovial membrane: observations in osteoarthritic knee. J Orthop Res. 2015 Apr; 33(4):556-62. PMID: 25410897; PMCID: PMC4586164.
    28. Kurd M, Cohick S, Park A, Ahmadinia K, Lee J, An H. Fusion in degenerative spondylolisthesis: comparison of osteoconductive and osteoinductive bone graft substitutes. Eur Spine J. 2015 May; 24(5):1066-73. PMID: 25371089.
      View in: PubMed
    29. An HS, Kang HW, Han HS, Park JY, Hong CG, Park J, Myeong JI, An CM. Genetic differences between the wild and hatchery-produced populations of Korean short barbeled grunter (Hapalogenys nitens) determined with microsatellite markers. Genet Mol Res. 2014 Oct 31; 13(4):8901-12. PMID: 25366781.
      View in: PubMed
    30. Gu SX, Li X, Hamilton JL, Chee A, Kc R, Chen D, An HS, Kim JS, Oh CD, Ma YZ, van Wijnen AJ, Im HJ. MicroRNA-146a reduces IL-1 dependent inflammatory responses in the intervertebral disc. Gene. 2015 Jan 25; 555(2):80-7. PMID: 25311550; PMCID: PMC4495656.
    31. An HS, Kim HY, Kim JB, Chang DS, Park KD, Lee JW, Myeong JI, An CM. Genetic characterization of hatchery populations of Korean spotted sea bass (Lateolabrax maculatus) using multiplex polymerase chain reaction assays. Genet Mol Res. 2014 Aug 28; 13(3):6701-15. PMID: 25177950.
      View in: PubMed
    32. Senoo I, Espinoza Orías AA, An HS, Andersson GB, Park DK, Triano JJ, Inoue N. In vivo 3-dimensional morphometric analysis of the lumbar foramen in healthy subjects. Spine (Phila Pa 1976). 2014 Jul 15; 39(16):E929-35. PMID: 24825158; PMCID: PMC4111842.
    33. Ruel N, Markova DZ, Adams SL, Scanzello C, Cs-Szabo G, Gerard D, Shi P, Anderson DG, Zack M, An HS, Chen D, Zhang Y. Fibronectin fragments and the cleaving enzyme ADAM-8 in the degenerative human intervertebral disc. Spine (Phila Pa 1976). 2014 Jul 15; 39(16):1274-9. PMID: 25010013; PMCID: PMC4229950.
    34. An HS, Al-Shihabi L, Kurd M. Surgical treatment for ossification of the posterior longitudinal ligament in the cervical spine. J Am Acad Orthop Surg. 2014 Jul; 22(7):420-9. PMID: 24966248.
      View in: PubMed
    35. Cvetanovich GL, Hsu AR, Frank RM, An HS, Andersson GB. Spontaneous resorption of a large cervical herniated nucleus pulposus. Am J Orthop (Belle Mead NJ). 2014 Jul; 43(7):E140-5. PMID: 25046190.
      View in: PubMed
    36. An H, Xu L, Zhu Y, Lv T, Liu W, Liu Y, Liu H, Chen L, Xu J, Lin Z. High CXC chemokine receptor 4 expression is an adverse prognostic factor in patients with clear-cell renal cell carcinoma. Br J Cancer. 2014 Apr 29; 110(9):2261-8. PMID: 24714746; PMCID: PMC4007240.
    37. Zhang Y, Lenart BA, Lee JK, Chen D, Shi P, Ren J, Muehleman C, Chen D, An HS. Histological features of endplates of the mammalian spine: from mice to men. Spine (Phila Pa 1976). 2014 Mar 01; 39(5):E312-7. PMID: 24365894; PMCID: PMC4086915.
    38. Hong JT, Qasim M, Espinoza Orías AA, Natarajan RN, An HS. A biomechanical comparison of three different posterior fixation constructs used for c6-c7 cervical spine immobilization: a finite element study. Neurol Med Chir (Tokyo). 2014; 54(9):727-35. PMID: 24418790; PMCID: PMC4533369.
    39. Tannoury CA, An HS. Complications with the use of bone morphogenetic protein 2 (BMP-2) in spine surgery. Spine J. 2014 Mar 01; 14(3):552-9. PMID: 24412416.
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    40. Chee AV, Ren J, Lenart BA, Chen EY, Zhang Y, An HS. Cytotoxicity of local anesthetics and nonionic contrast agents on bovine intervertebral disc cells cultured in a three-dimensional culture system. Spine J. 2014 Mar 01; 14(3):491-8. PMID: 24246749; PMCID: PMC3945015.
    41. Hussain M, Nassr A, Natarajan RN, An HS, Andersson GB. Relationship between biomechanical changes at adjacent segments and number of fused bone grafts in multilevel cervical fusions: a finite element investigation. J Neurosurg Spine. 2014 Jan; 20(1):22-9. PMID: 24180310.
      View in: PubMed
    42. Qasim M, Natarajan RN, An HS, Andersson GB. Damage accumulation location under cyclic loading in the lumbar disc shifts from inner annulus lamellae to peripheral annulus with increasing disc degeneration. J Biomech. 2014 Jan 03; 47(1):24-31. PMID: 24231247.
      View in: PubMed
    43. Ma X, An HS, Zhang Y, Brown NM, Chen Z, Zhang G, Xiang H, Hu Y, Chen B. A radical procedure of circumferential spinal cord decompression through a modified posterior approach for thoracic myelopathy caused by severely impinging anterior ossification. Spine J. 2014 Apr; 14(4):651-8. PMID: 24161362.
      View in: PubMed
    44. Kim JS, Ellman MB, Yan D, An HS, Kc R, Li X, Chen D, Xiao G, Cs-Szabo G, Hoskin DW, Buechter DD, Van Wijnen AJ, Im HJ. Lactoferricin mediates anti-inflammatory and anti-catabolic effects via inhibition of IL-1 and LPS activity in the intervertebral disc. J Cell Physiol. 2013 Sep; 228(9):1884-96. PMID: 23460134; PMCID: PMC3703102.
    45. Lu X, An H, Jin R, Zou M, Guo Y, Su PF, Liu D, Shyr Y, Yarbrough WG. PPM1A is a RelA phosphatase with tumor suppressor-like activity. Oncogene. 2014 May 29; 33(22):2918-27. PMID: 23812431; PMCID: PMC3897569.
    46. Qasim M, Hong JT, Natarajan RN, An HS. A Biomechanical Comparison of Intralaminar C7 Screw Constructs with and without Offset Connector Used for C6-7 Cervical Spine Immobilization : A Finite Element Study. J Korean Neurosurg Soc. 2013 Jun; 53(6):331-6. PMID: 24003366; PMCID: PMC3756124.
    47. Anderson DG, Markova D, An HS, Chee A, Enomoto-Iwamoto M, Markov V, Saitta B, Shi P, Gupta C, Zhang Y. Human umbilical cord blood-derived mesenchymal stem cells in the cultured rabbit intervertebral disc: a novel cell source for disc repair. Am J Phys Med Rehabil. 2013 May; 92(5):420-9. PMID: 23598901; PMCID: PMC4238943.
    48. Ellman MB, Kim J, An HS, Chen D, Kc R, Li X, Xiao G, Yan D, Suh J, van Wjnen AJ, Wang JH, Kim SG, Im HJ. Lactoferricin enhances BMP7-stimulated anabolic pathways in intervertebral disc cells. Gene. 2013 Jul 25; 524(2):282-91. PMID: 23644135; PMCID: PMC3679319.
    49. Hussain M, Nassr A, Natarajan RN, An HS, Andersson GB. Biomechanics of adjacent segments after a multilevel cervical corpectomy using anterior, posterior, and combined anterior-posterior instrumentation techniques: a finite element model study. Spine J. 2013 Jun; 13(6):689-96. PMID: 23578989.
      View in: PubMed
    50. Ellman MB, Yan D, Ahmadinia K, Chen D, An HS, Im HJ. Fibroblast growth factor control of cartilage homeostasis. J Cell Biochem. 2013 Apr; 114(4):735-42. PMID: 23060229; PMCID: PMC3690116.
    51. Cha TD, An HS. Cervical spine manifestations in patients with inflammatory arthritides. Nat Rev Rheumatol. 2013 Jul; 9(7):423-32. PMID: 23528639.
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    52. Moss IL, Zhang Y, Shi P, Chee A, Piel MJ, An HS. Retroperitoneal approach to the intervertebral disc for the annular puncture model of intervertebral disc degeneration in the rabbit. Spine J. 2013 Mar; 13(3):229-34. PMID: 23369496.
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    53. Hsu WK, Nickoli MS, Wang JC, Lieberman JR, An HS, Yoon ST, Youssef JA, Brodke DS, McCullough CM. Improving the clinical evidence of bone graft substitute technology in lumbar spine surgery. Global Spine J. 2012 Dec; 2(4):239-48. PMID: 24353975; PMCID: PMC3864464.
    54. Jacobs JJ, An HS. Commentary: Total disc arthroplasty and the bearing surface debate. Spine J. 2012 Aug; 12(8):702-4. PMID: 23021032.
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    55. Lotz JC, Haughton V, Boden SD, An HS, Kang JD, Masuda K, Freemont A, Berven S, Sengupta DK, Tanenbaum L, Maurer P, Ranganathan A, Alavi A, Marinelli NL. New treatments and imaging strategies in degenerative disease of the intervertebral disks. Radiology. 2012 Jul; 264(1):6-19. PMID: 22723559.
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    56. Ellman MB, Kim JS, An HS, Chen D, KC R, An J, Dittakavi T, van Wijnen AJ, Cs-Szabo G, Li X, Xiao G, An S, Kim SG, Im HJ. Toll-like receptor adaptor signaling molecule MyD88 on intervertebral disk homeostasis: in vitro, ex vivo studies. Gene. 2012 Sep 01; 505(2):283-90. PMID: 22692007; PMCID: PMC3518428.
    57. Qasim M, Natarajan RN, An HS, Andersson GB. Initiation and progression of mechanical damage in the intervertebral disc under cyclic loading using continuum damage mechanics methodology: A finite element study. J Biomech. 2012 Jul 26; 45(11):1934-40. PMID: 22682891; PMCID: PMC3787695.
    58. Hussain M, Natarajan RN, Chaudhary G, An HS, Andersson GB. Posterior facet load changes in adjacent segments due to moderate and severe degeneration in C5-C6 disc: a poroelastic C3-T1 finite element model study. J Spinal Disord Tech. 2012 Jun; 25(4):218-25. PMID: 22652989.
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    59. Khan SN, Braaksma B, An HS. Cervical pedicle subtraction osteotomy for fixed flexion deformities. Orthopedics. 2012 Jun; 35(6):484-9. PMID: 22691636.
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    60. Kang J, An H, Hilibrand A, Yoon ST, Kavanagh E, Boden S. Grafton and local bone have comparable outcomes to iliac crest bone in instrumented single-level lumbar fusions. Spine (Phila Pa 1976). 2012 May 20; 37(12):1083-91. PMID: 22076647.
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    61. Takigawa T, Simon P, Espinoza Orías AA, Hong JT, Ito Y, Inoue N, An HS. Biomechanical comparison of occiput-C1-C2 fixation techniques: C0-C1 transarticular screw and direct occiput condyle screw. Spine (Phila Pa 1976). 2012 May 20; 37(12):E696-701. PMID: 22158063.
      View in: PubMed
    62. Simon P, Espinoza Orías AA, Andersson GB, An HS, Inoue N. In vivo topographic analysis of lumbar facet joint space width distribution in healthy and symptomatic subjects. Spine (Phila Pa 1976). 2012 May 20; 37(12):1058-64. PMID: 22433501; PMCID: PMC3685171.
    63. Hussain M, Nassr A, Natarajan RN, An HS, Andersson GB. Corpectomy versus discectomy for the treatment of multilevel cervical spine pathology: a finite element model analysis. Spine J. 2012 May; 12(5):401-8. PMID: 22572585.
      View in: PubMed
    64. Kim JS, Ellman MB, An HS, Yan D, van Wijnen AJ, Murphy G, Hoskin DW, Im HJ. Lactoferricin mediates anabolic and anti-catabolic effects in the intervertebral disc. J Cell Physiol. 2012 Apr; 227(4):1512-20. PMID: 21678402.
      View in: PubMed
    65. Singh K, Phillips FM, Park DK, Pelton MA, An HS, Goldberg EJ. Factors affecting reoperations after anterior cervical discectomy and fusion within and outside of a Federal Drug Administration investigational device exemption cervical disc replacement trial. Spine J. 2012 May; 12(5):372-8. PMID: 22425784.
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    66. Park J, Chung S, An H, Kim J, Seo J, Kim DH, Yoon SY. Haloperidol and clozapine block formation of autophagolysosomes in rat primary neurons. Neuroscience. 2012 May 03; 209:64-73. PMID: 22390943.
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    67. Jacobson ME, Khan SN, An HS. C1-C2 posterior fixation: indications, technique, and results. Orthop Clin North Am. 2012 Jan; 43(1):11-8, vii. PMID: 22082625.
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    68. Ellman MB, Kim JS, An HS, Kroin JS, Li X, Chen D, Yan D, Buechter DD, Nakayama K, Liu B, Morgan S, Im HJ. The pathophysiologic role of the protein kinase Cd pathway in the intervertebral discs of rabbits and mice: in vitro, ex vivo, and in vivo studies. Arthritis Rheum. 2012 Jun; 64(6):1950-9. PMID: 22161873; PMCID: PMC3307815.
    69. Kim JS, Kroin JS, Li X, An HS, Buvanendran A, Yan D, Tuman KJ, van Wijnen AJ, Chen D, Im HJ. The rat intervertebral disk degeneration pain model: relationships between biological and structural alterations and pain. Arthritis Res Ther. 2011; 13(5):R165. PMID: 21996269; PMCID: PMC3308099.
    70. An HS, Kim EM, Lee JH, Noh JK, An CM, Yoon SJ, Park KD, Myeong JI. Population genetic structure of wild and hatchery black rockfish Sebastes inermis in Korea, assessed using cross-species microsatellite markers. Genet Mol Res. 2011 Oct 13; 10(4):2492-504. PMID: 22009861.
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    71. Hussain M, Natarajan RN, An HS, Andersson GB. Progressive disc degeneration at C5-C6 segment affects the mechanics between disc heights and posterior facets above and below the degenerated segment: A flexion-extension investigation using a poroelastic C3-T1 finite element model. Med Eng Phys. 2012 Jun; 34(5):552-8. PMID: 21925919.
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    72. Hong JT, Takigawa T, Udayakunmar R, Shin HK, Simon P, Espinoza Orías AA, Inoue N, An HS. Biomechanical effect of the C2 laminar decortication on the stability of C2 intralaminar screw construct and biomechanical comparison of C2 intralaminar screw and C2 pars screw. Neurosurgery. 2011 Sep; 69(1 Suppl Operative):ons1-6; discussion ons6-7. PMID: 21415794.
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    73. Zhang Y, Drapeau S, An HS, Markova D, Lenart BA, Anderson DG. Histological features of the degenerating intervertebral disc in a goat disc-injury model. Spine (Phila Pa 1976). 2011 Sep 01; 36(19):1519-27. PMID: 21245789; PMCID: PMC3117031.
    74. Siemionow K, An H, Masuda K, Andersson G, Cs-Szabo G. The effects of age, sex, ethnicity, and spinal level on the rate of intervertebral disc degeneration: a review of 1712 intervertebral discs. Spine (Phila Pa 1976). 2011 Aug 01; 36(17):1333-9. PMID: 21217432; PMCID: PMC3117081.
    75. An HS, Masuda K, Cs-Szabo G, Zhang Y, Chee A, Andersson GB, Im HJ, Thonar EJ, Kwon YM. Biologic repair and regeneration of the intervertebral disk. J Am Acad Orthop Surg. 2011 Jul; 19(7):450-2. PMID: 21724924.
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    76. Zhang Y, Chee A, Thonar EJ, An HS. Intervertebral disk repair by protein, gene, or cell injection: a framework for rehabilitation-focused biologics in the spine. PM R. 2011 Jun; 3(6 Suppl 1):S88-94. PMID: 21703587.
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    77. Hussain M, Nassr A, Natarajan RN, An HS, Andersson GB. Biomechanical effects of anterior, posterior, and combined anterior-posterior instrumentation techniques on the stability of a multilevel cervical corpectomy construct: a finite element model analysis. Spine J. 2011 Apr; 11(4):324-30. PMID: 21474084.
      View in: PubMed
    78. Tedla N, An H, Borges L, Vollmer-Conna U, Bryant K, Geczy C, McNeil HP. Expression of activating and inhibitory leukocyte immunoglobulin-like receptors in rheumatoid synovium: correlations to disease activity. Tissue Antigens. 2011 Apr; 77(4):305-16. PMID: 21388353.
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    79. Hong JT, Tomoyuki T, Udayakumar R, Espinoza Orías AA, Inoue N, An HS. Biomechanical comparison of three different types of C7 fixation techniques. Spine (Phila Pa 1976). 2011 Mar 01; 36(5):393-8. PMID: 21325933.
      View in: PubMed
    80. Hussain M, Natarajan RN, Chaudhary G, An HS, Andersson GB. Simulation of inhomogeneous rather than homogeneous poroelastic tissue material properties within disc annulus and nucleus better predicts cervical spine response: a C3-T1 finite element model analysis under compression and moment loadings. Spine (Phila Pa 1976). 2011 Feb 15; 36(4):E245-55. PMID: 21270714.
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    81. Nie H, Jiang D, Ou Y, Quan Z, Hao J, Bai C, Huang X, An H. Procalcitonin as an early predictor of postoperative infectious complications in patients with acute traumatic spinal cord injury. Spinal Cord. 2011 Jun; 49(6):715-20. PMID: 21243003.
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    82. Hong JT, Takigawa T, Sugisaki K, Espinoza Orías AA, Inoue N, An HS. Biomechanical and morphometric evaluation of occipital condyle for occipitocervical segmental fixation. Neurol Med Chir (Tokyo). 2011; 51(10):701-6. PMID: 22027245.
      View in: PubMed
    83. Hussain M, Natarajan RN, Chaudhary G, An HS, Andersson GB. Relative contributions of strain-dependent permeability and fixed charged density of proteoglycans in predicting cervical disc biomechanics: a poroelastic C5-C6 finite element model study. Med Eng Phys. 2011 May; 33(4):438-45. PMID: 21167763.
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    84. Hussain M, Natarajan RN, An HS, Andersson GB. Reduction in segmental flexibility because of disc degeneration is accompanied by higher changes in facet loads than changes in disc pressure: a poroelastic C5-C6 finite element investigation. Spine J. 2010 Dec; 10(12):1069-77. PMID: 21094468.
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    85. Kim JS, Ellman MB, An HS, van Wijnen AJ, Borgia JA, Im HJ. Insulin-like growth factor 1 synergizes with bone morphogenetic protein 7-mediated anabolism in bovine intervertebral disc cells. Arthritis Rheum. 2010 Dec; 62(12):3706-15. PMID: 20812336; PMCID: PMC2995823.
    86. Takatori R, Tokunaga D, Hase H, Mikami Y, Ikeda T, Harada T, Imai K, Ito H, Nishimura T, An HS, Inoue N, Kubo T. Three-dimensional morphology and kinematics of the craniovertebral junction in rheumatoid arthritis. Spine (Phila Pa 1976). 2010 Nov 01; 35(23):E1278-84. PMID: 20736886.
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    87. Duan CY, Espinoza Orías AA, Shott S, An HS, Andersson GB, Hu JZ, Lu HB, Inoue N. In vivo measurement of the subchondral bone thickness of lumbar facet joint using magnetic resonance imaging. Osteoarthritis Cartilage. 2011 Jan; 19(1):96-102. PMID: 21034837; PMCID: PMC3011863.
    88. Takigawa T, Espinoza Orías AA, An HS, Gohgi S, Udayakumar RK, Sugisaki K, Natarajan RN, Wimmer MA, Inoue N. Spinal kinematics and facet load transmission after total disc replacement. Spine (Phila Pa 1976). 2010 Oct 15; 35(22):E1160-6. PMID: 20881657.
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    89. Yun MH, Seo YS, Kang HS, Lee KG, Kim JH, An H, Yim HJ, Keum B, Jeen YT, Lee HS, Chun HJ, Um SH, Kim CD, Ryu HS. The effect of the respiratory cycle on liver stiffness values as measured by transient elastography. J Viral Hepat. 2011 Sep; 18(9):631-6. PMID: 21029256.
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    90. Son KH, Ahn CB, An H, Choe G, Lee SH, Sun K. Stability of CoaguChek XS test strip is not effected by frequency of air exposure. Int J Lab Hematol. 2010 Dec; 32(6 Pt 1):e248-50. PMID: 20731731.
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    91. Hussain M, Natarajan RN, An HS, Andersson GB. Patterns of height changes in anterior and posterior cervical disc regions affects the contact loading at posterior facets during moderate and severe disc degeneration: a poroelastic C5-C6 finite element model study. Spine (Phila Pa 1976). 2010 Aug 15; 35(18):E873-81. PMID: 21289493.
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    92. Anderson DG, Markova D, Adams SL, Pacifici M, An HS, Zhang Y. Fibronectin splicing variants in human intervertebral disc and association with disc degeneration. Spine (Phila Pa 1976). 2010 Aug 01; 35(17):1581-8. PMID: 20628340.
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    93. Weinstein JN, Tosteson TD, Lurie JD, Tosteson A, Blood E, Herkowitz H, Cammisa F, Albert T, Boden SD, Hilibrand A, Goldberg H, Berven S, An H. Surgical versus nonoperative treatment for lumbar spinal stenosis four-year results of the Spine Patient Outcomes Research Trial. Spine (Phila Pa 1976). 2010 Jun 15; 35(14):1329-38. PMID: 20453723; PMCID: PMC3392200.
    94. Park DK, Lee MJ, Lin EL, Singh K, An HS, Phillips FM. The relationship of intrapsoas nerves during a transpsoas approach to the lumbar spine: anatomic study. J Spinal Disord Tech. 2010 Jun; 23(4):223-8. PMID: 20084033.
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    95. Hussain M, Natarajan RN, An HS, Andersson GB. Motion changes in adjacent segments due to moderate and severe degeneration in C5-C6 disc: a poroelastic C3-T1 finite element model study. Spine (Phila Pa 1976). 2010 Apr 20; 35(9):939-47. PMID: 20375779.
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    96. Otsuka Y, An HS, Ochia RS, Andersson GB, Espinoza Orías AA, Inoue N. In vivo measurement of lumbar facet joint area in asymptomatic and chronic low back pain subjects. Spine (Phila Pa 1976). 2010 Apr 15; 35(8):924-8. PMID: 20354471; PMCID: PMC2855783.
    97. Park DK, An HS, Lurie JD, Zhao W, Tosteson A, Tosteson TD, Herkowitz H, Errico T, Weinstein JN. Does multilevel lumbar stenosis lead to poorer outcomes?: a subanalysis of the Spine Patient Outcomes Research Trial (SPORT) lumbar stenosis study. Spine (Phila Pa 1976). 2010 Feb 15; 35(4):439-46. PMID: 20081560; PMCID: PMC2886146.
    98. Sugisaki K, An HS, Espinoza Orías AA, Rhim R, Andersson GB, Inoue N. In vivo three-dimensional morphometric analysis of the lumbar pedicle isthmus. Spine (Phila Pa 1976). 2009 Nov 15; 34(24):2599-604. PMID: 19910763; PMCID: PMC2810254.
    99. Hussain M, Natarajan RN, Fayyazi AH, Braaksma BR, Andersson GB, An HS. Screw angulation affects bone-screw stresses and bone graft load sharing in anterior cervical corpectomy fusion with a rigid screw-plate construct: a finite element model study. Spine J. 2009 Dec; 9(12):1016-23. PMID: 19819193.
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    100. Deng Y, Lv G, An HS. En bloc spondylectomy for the treatment of spinal tuberculosis with fixed and sharply angulated kyphotic deformity. Spine (Phila Pa 1976). 2009 Sep 15; 34(20):2140-6. PMID: 19752699.
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    101. An HS. Making ethical decisions in current orthopedic practice. Am J Orthop (Belle Mead NJ). 2009 Aug; 38(8):382-3. PMID: 19809602.
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    102. Kim JS, An H, Rieter WJ, Esserman D, Taylor-Pashow KM, Sartor RB, Lin W, Lin W, Tarrant TK. Multimodal optical and Gd-based nanoparticles for imaging in inflammatory arthritis. Clin Exp Rheumatol. 2009 Jul-Aug; 27(4):580-6. PMID: 19772788.
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    103. Zhang Y, Markova D, Im HJ, Hu W, Thonar EJ, He TC, An HS, Phillips FM, Anderson DG. Primary bovine intervertebral disc cells transduced with adenovirus overexpressing 12 BMPs and Sox9 maintain appropriate phenotype. Am J Phys Med Rehabil. 2009 Jun; 88(6):455-63. PMID: 19454853; PMCID: PMC2894691.
    104. Park DK, An HS. Problems related to cervical fusion: malalignment and nonunion. Instr Course Lect. 2009; 58:737-45. PMID: 19385582.
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    105. Singh K, Masuda K, Thonar EJ, An HS, Cs-Szabo G. Age-related changes in the extracellular matrix of nucleus pulposus and anulus fibrosus of human intervertebral disc. Spine (Phila Pa 1976). 2009 Jan 01; 34(1):10-6. PMID: 19127156; PMCID: PMC2837353.
    106. Pearson AM, Lurie JD, Blood EA, Frymoyer JW, Braeutigam H, An H, Girardi FP, Weinstein JN. Spine patient outcomes research trial: radiographic predictors of clinical outcomes after operative or nonoperative treatment of degenerative spondylolisthesis. Spine (Phila Pa 1976). 2008 Dec 01; 33(25):2759-66. PMID: 19050582; PMCID: PMC2775527.
    107. Li X, Phillips FM, An HS, Ellman M, Thonar EJ, Wu W, Park D, Im HJ. The action of resveratrol, a phytoestrogen found in grapes, on the intervertebral disc. Spine (Phila Pa 1976). 2008 Nov 15; 33(24):2586-95. PMID: 19011540; PMCID: PMC2905225.
    108. Hong JT, Park DK, Lee MJ, Kim SW, An HS. Anatomical variations of the vertebral artery segment in the lower cervical spine: analysis by three-dimensional computed tomography angiography. Spine (Phila Pa 1976). 2008 Oct 15; 33(22):2422-6. PMID: 18923317.
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    109. Zhang Y, An HS, Tannoury C, Thonar EJ, Freedman MK, Anderson DG. Biological treatment for degenerative disc disease: implications for the field of physical medicine and rehabilitation. Am J Phys Med Rehabil. 2008 Sep; 87(9):694-702. PMID: 18716481.
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    110. An HS. New options in spine surgery--judgment is as important as ever. Am J Orthop (Belle Mead NJ). 2008 Aug; 37(8):397-8. PMID: 18836594.
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    111. Kim KW, Ha KY, Lee JS, Nam SW, Woo YK, Lim TH, An HS. Notochordal cells stimulate migration of cartilage end plate chondrocytes of the intervertebral disc in in vitro cell migration assays. Spine J. 2009 Apr; 9(4):323-9. PMID: 18619909.
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    112. Ellman MB, An HS, Muddasani P, Im HJ. Biological impact of the fibroblast growth factor family on articular cartilage and intervertebral disc homeostasis. Gene. 2008 Aug 15; 420(1):82-9. PMID: 18565695; PMCID: PMC2525607.
    113. Takatori R, Tokunaga D, Inoue N, Hase H, Harada T, Suzuki H, Ito H, Nishimura T, An HS, Kubo T. In vivo segmental motion of the cervical spine in rheumatoid arthritis patients with atlantoaxial subluxation. Clin Exp Rheumatol. 2008 May-Jun; 26(3):442-8. PMID: 18578966.
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    114. Li X, An HS, Ellman M, Phillips F, Thonar EJ, Park DK, Udayakumar RK, Im HJ. Action of fibroblast growth factor-2 on the intervertebral disc. Arthritis Res Ther. 2008; 10(2):R48. PMID: 18435858; PMCID: PMC2453768.
    115. Zhang Y, Phillips FM, Thonar EJ, Oegema T, An HS, Roman-Blas JA, He TC, Anderson DG. Cell therapy using articular chondrocytes overexpressing BMP-7 or BMP-10 in a rabbit disc organ culture model. Spine (Phila Pa 1976). 2008 Apr 15; 33(8):831-8. PMID: 18404100.
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    116. Singh K, Samartzis D, Biyani A, An HS. Lumbar spinal stenosis. J Am Acad Orthop Surg. 2008 Mar; 16(3):171-6. PMID: 18316715.
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    117. Singh K, Samartzis D, Somera AL, An HS. Cervical kyphosis and thoracic lordoscoliosis in a patient with cerebral palsy. Orthopedics. 2008 Mar; 31(3):276. PMID: 19292233.
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    118. An HS. Orthopedic surgeon in the ER: the importance of remembering the basics. Am J Orthop (Belle Mead NJ). 2008 Mar; 37(3):E46. PMID: 18438476.
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    119. Weinstein JN, Tosteson TD, Lurie JD, Tosteson AN, Blood E, Hanscom B, Herkowitz H, Cammisa F, Albert T, Boden SD, Hilibrand A, Goldberg H, Berven S, An H. Surgical versus nonsurgical therapy for lumbar spinal stenosis. N Engl J Med. 2008 Feb 21; 358(8):794-810. PMID: 18287602; PMCID: PMC2576513.
    120. Natarajan RN, Williams JR, Lavender SA, An HS, Anderson GB. Relationship between disc injury and manual lifting: a poroelastic finite element model study. Proc Inst Mech Eng H. 2008 Feb; 222(2):195-207. PMID: 18441755.
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    121. Yamada M, Akeda K, Asanuma K, Thonar EJ, An HS, Uchida A, Masuda K. Effect of osteogenic protein-1 on the matrix metabolism of bovine tendon cells. J Orthop Res. 2008 Jan; 26(1):42-8. PMID: 17676621.
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    122. Zhang Y, Anderson DG, Phillips FM, Thonar EJ, He TC, Pietryla D, An HS. Comparative effects of bone morphogenetic proteins and Sox9 overexpression on matrix accumulation by bovine anulus fibrosus cells: implications for anular repair. Spine (Phila Pa 1976). 2007 Nov 01; 32(23):2515-20. PMID: 17978648.
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    123. Patel KP, Sandy JD, Akeda K, Miyamoto K, Chujo T, An HS, Masuda K. Aggrecanases and aggrecanase-generated fragments in the human intervertebral disc at early and advanced stages of disc degeneration. Spine (Phila Pa 1976). 2007 Nov 01; 32(23):2596-603. PMID: 17978660.
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    124. Kim KW, Ha KY, Lee JS, Rhyu KW, An HS, Woo YK. The apoptotic effects of oxidative stress and antiapoptotic effects of caspase inhibitors on rat notochordal cells. Spine (Phila Pa 1976). 2007 Oct 15; 32(22):2443-8. PMID: 18090083.
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    125. Samartzis D, Marco RA, Jenis LG, Khanna N, Banco RJ, Goldberg EJ, An HS. Characterization of graft subsidence in anterior cervical discectomy and fusion with rigid anterior plate fixation. Am J Orthop (Belle Mead NJ). 2007 Aug; 36(8):421-7. PMID: 17849027.
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    126. Ochia RS, Inoue N, Takatori R, Andersson GB, An HS. In vivo measurements of lumbar segmental motion during axial rotation in asymptomatic and chronic low back pain male subjects. Spine (Phila Pa 1976). 2007 Jun 01; 32(13):1394-9. PMID: 17545906.
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    127. Imai Y, Miyamoto K, An HS, Thonar EJ, Andersson GB, Masuda K. Recombinant human osteogenic protein-1 upregulates proteoglycan metabolism of human anulus fibrosus and nucleus pulposus cells. Spine (Phila Pa 1976). 2007 May 20; 32(12):1303-9; discussion 1310. PMID: 17515818.
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    128. Imai Y, Okuma M, An HS, Nakagawa K, Yamada M, Muehleman C, Thonar E, Masuda K. Restoration of disc height loss by recombinant human osteogenic protein-1 injection into intervertebral discs undergoing degeneration induced by an intradiscal injection of chondroitinase ABC. Spine (Phila Pa 1976). 2007 May 15; 32(11):1197-205. PMID: 17495776.
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    129. Aoki Y, An HS, Takahashi K, Miyamoto K, Lenz ME, Moriya H, Masuda K. Axonal growth potential of lumbar dorsal root ganglion neurons in an organ culture system: response of nerve growth factor-sensitive neurons to neuronal injury and an inflammatory cytokine. Spine (Phila Pa 1976). 2007 Apr 15; 32(8):857-63. PMID: 17426629.
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    130. Abe Y, Akeda K, An HS, Aoki Y, Pichika R, Muehleman C, Kimura T, Masuda K. Proinflammatory cytokines stimulate the expression of nerve growth factor by human intervertebral disc cells. Spine (Phila Pa 1976). 2007 Mar 15; 32(6):635-42. PMID: 17413467.
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    131. Turner TM, Urban RM, Singh K, Hall DJ, Renner SM, Lim TH, Tomlinson MJ, An HS. Vertebroplasty comparing injectable calcium phosphate cement compared with polymethylmethacrylate in a unique canine vertebral body large defect model. Spine J. 2008 May-Jun; 8(3):482-7. PMID: 18455113.
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    132. Akeda K, An HS, Pichika R, Patel K, Muehleman C, Nakagawa K, Uchida A, Masuda K. The expression of NG2 proteoglycan in the human intervertebral disc. Spine (Phila Pa 1976). 2007 Feb 01; 32(3):306-14. PMID: 17268261.
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    133. Ahn NU, Ahn UM, Ipsen B, An HS. Mechanical neck pain and cervicogenic headache. Neurosurgery. 2007 Jan; 60(1 Supp1 1):S21-7. PMID: 17204881.
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    134. Chujo T, An HS, Akeda K, Miyamoto K, Muehleman C, Attawia M, Andersson G, Masuda K. Effects of growth differentiation factor-5 on the intervertebral disc--in vitro bovine study and in vivo rabbit disc degeneration model study. Spine (Phila Pa 1976). 2006 Dec 01; 31(25):2909-17. PMID: 17139221.
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    135. Zhang Y, Kerns JM, Anderson DG, Lee YS, Chen EY, Tannoury C, An HS. Sensory neurons and fibers from multiple spinal cord levels innervate the rabbit lumbar disc. Am J Phys Med Rehabil. 2006 Nov; 85(11):865-71. PMID: 17079958.
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    136. Miyamoto K, Masuda K, Kim JG, Inoue N, Akeda K, Andersson GB, An HS. Intradiscal injections of osteogenic protein-1 restore the viscoelastic properties of degenerated intervertebral discs. Spine J. 2006 Nov-Dec; 6(6):692-703. PMID: 17088200.
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    137. Aoki Y, Akeda K, An H, Muehleman C, Takahashi K, Moriya H, Masuda K. Nerve fiber ingrowth into scar tissue formed following nucleus pulposus extrusion in the rabbit anular-puncture disc degeneration model: effects of depth of puncture. Spine (Phila Pa 1976). 2006 Oct 01; 31(21):E774-80. PMID: 17023838.
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    138. An HS, Masuda K, Inoue N. Intervertebral disc degeneration: biological and biomechanical factors. J Orthop Sci. 2006 Oct; 11(5):541-52. PMID: 17013747; PMCID: PMC2778630.
    139. An HS. Artificial disc replacement: progress or hype? Am J Orthop (Belle Mead NJ). 2006 Sep; 35(9):405. PMID: 17036774.
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    140. Zhang Y, An HS, Thonar EJ, Chubinskaya S, He TC, Phillips FM. Comparative effects of bone morphogenetic proteins and sox9 overexpression on extracellular matrix metabolism of bovine nucleus pulposus cells. Spine (Phila Pa 1976). 2006 Sep 01; 31(19):2173-9. PMID: 16946650.
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    141. Singh K, An HS. Motion preservation technologies: alternatives to spinal fusion. Am J Orthop (Belle Mead NJ). 2006 Sep; 35(9):411-6. PMID: 17036776.
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    142. Ochia RS, Inoue N, Renner SM, Lorenz EP, Lim TH, Andersson GB, An HS. Three-dimensional in vivo measurement of lumbar spine segmental motion. Spine (Phila Pa 1976). 2006 Aug 15; 31(18):2073-8. PMID: 16915091.
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    143. An H, Phillips FM. The future of spinal fusion. Orthopedics. 2006 Aug; 29(8):683-4. PMID: 16924859.
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    144. Masuda K, An HS. Prevention of disc degeneration with growth factors. Eur Spine J. 2006 Aug; 15 Suppl 3:S422-32. PMID: 16865380; PMCID: PMC2335371.
    145. Renner SM, Natarajan RN, Patwardhan AG, Havey RM, Voronov LI, Guo BY, Andersson GB, An HS. Novel model to analyze the effect of a large compressive follower pre-load on range of motions in a lumbar spine. J Biomech. 2007; 40(6):1326-32. PMID: 16843473.
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    146. Akeda K, An HS, Okuma M, Attawia M, Miyamoto K, Thonar EJ, Lenz ME, Sah RL, Masuda K. Platelet-rich plasma stimulates porcine articular chondrocyte proliferation and matrix biosynthesis. Osteoarthritis Cartilage. 2006 Dec; 14(12):1272-80. PMID: 16820306.
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    147. Aota Y, An HS, Imai Y, Thonar EJ, Muehleman C, Masuda K. Comparison of cellular response in bovine intervertebral disc cells and articular chondrocytes: effects .of lipopolysaccharide on proteoglycan metabolism. Cell Tissue Res. 2006 Dec; 326(3):787-93. PMID: 16788835.
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    148. Akeda K, An HS, Pichika R, Attawia M, Thonar EJ, Lenz ME, Uchida A, Masuda K. Platelet-rich plasma (PRP) stimulates the extracellular matrix metabolism of porcine nucleus pulposus and anulus fibrosus cells cultured in alginate beads. Spine (Phila Pa 1976). 2006 Apr 20; 31(9):959-66. PMID: 16641770.
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    149. Andersson GB, An HS, Oegema TR, Setton LA. Directions for future research. J Bone Joint Surg Am. 2006 Apr; 88 Suppl 2:110-4. PMID: 16595455.
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    150. Masuda K, Imai Y, Okuma M, Muehleman C, Nakagawa K, Akeda K, Thonar E, Andersson G, An HS. Osteogenic protein-1 injection into a degenerated disc induces the restoration of disc height and structural changes in the rabbit anular puncture model. Spine (Phila Pa 1976). 2006 Apr 01; 31(7):742-54. PMID: 16582847.
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    151. An HS, Masuda K. Relevance of in vitro and in vivo models for intervertebral disc degeneration. J Bone Joint Surg Am. 2006 Apr; 88 Suppl 2:88-94. PMID: 16595451.
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    152. Andersson GB, An HS, Oegema TR, Setton LA. Intervertebral disc degeneration. Summary of an AAOS/NIH/ORS workshop, September 2005. J Bone Joint Surg Am. 2006 Apr; 88(4):895-9. PMID: 16595482.
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    153. Singh K, Samartzis D, Vaccaro AR, Andersson GB, An HS, Heller JG. Current concepts in the management of metastatic spinal disease. The role of minimally-invasive approaches. J Bone Joint Surg Br. 2006 Apr; 88(4):434-42. PMID: 16567775.
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    154. Singh K, Samartzis D, Pennington WT, Wise J, An HS. Unusual presentation of a paraspinal mass with involvement of a lumbar facet joint and the epidural space. Orthopedics. 2006 Mar; 29(3):265-7. PMID: 16539207.
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    155. An HS, Seldomridge JA. Spinal infections: diagnostic tests and imaging studies. Clin Orthop Relat Res. 2006 Mar; 444:27-33. PMID: 16523124.
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    156. Miyamoto K, Masuda K, Inoue N, Okuma M, Muehleman C, An HS. Anti-adhesion properties of a thrombin-based hemostatic gelatin in a canine laminectomy model: a biomechanical, biochemical, and histologic study. Spine (Phila Pa 1976). 2006 Feb 15; 31(4):E91-7. PMID: 16481942.
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    157. Singh K, Samartzis D, Heller JG, An HS, Vaccaro AR. The management of complex soft-tissue defects after spinal instrumentation. J Bone Joint Surg Br. 2006 Jan; 88(1):8-15. PMID: 16365112.
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    158. Zhang Y, Li Z, Thonar EJ, An HS, He TC, Pietryla D, Phillips FM. Transduced bovine articular chondrocytes affect the metabolism of cocultured nucleus pulposus cells in vitro: implications for chondrocyte transplantation into the intervertebral disc. Spine (Phila Pa 1976). 2005 Dec 01; 30(23):2601-7. PMID: 16319745.
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    159. Singh K, Samartzis D, Vaccaro AR, Nassr A, Andersson GB, Yoon ST, Phillips FM, Goldberg EJ, An HS. Congenital lumbar spinal stenosis: a prospective, control-matched, cohort radiographic analysis. Spine J. 2005 Nov-Dec; 5(6):615-22. PMID: 16291100.
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    160. Anderson DG, Yoon T, Shen F, Kang J, Phillips F, An H. Summary statement: biologic repair or regeneration of the intervertebral disc. Spine J. 2005 Nov-Dec; 5(6 Suppl):304S. PMID: 16291127.
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    161. Miyamoto K, An HS, Sah RL, Akeda K, Okuma M, Otten L, Thonar EJ, Masuda K. Exposure to pulsed low intensity ultrasound stimulates extracellular matrix metabolism of bovine intervertebral disc cells cultured in alginate beads. Spine (Phila Pa 1976). 2005 Nov 01; 30(21):2398-405. PMID: 16261116.
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    162. Lieberman I, Goins M, An H, Phillips F. Summary statement: kyphoplasty and nucleus pulposus prosthesis. Spine J. 2005 Nov-Dec; 5(6 Suppl):325S. PMID: 16291130.
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    163. An HS, Phillips FM. Editorial: are spine biologics the future in spinal surgery? Spine J. 2005 Nov-Dec; 5(6 Suppl):207S-208S. PMID: 16291114.
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    164. Shen FH, Samartzis D, An HS. Cell technologies for spinal fusion. Spine J. 2005 Nov-Dec; 5(6 Suppl):231S-239S. PMID: 16291118.
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    165. Singh K, Masuda K, An HS. Animal models for human disc degeneration. Spine J. 2005 Nov-Dec; 5(6 Suppl):267S-279S. PMID: 16291123.
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    166. Singh K, Heller JG, Samartzis D, Price JS, An HS, Yoon ST, Rhee J, Ledlie JT, Phillips FM. Open vertebral cement augmentation combined with lumbar decompression for the operative management of thoracolumbar stenosis secondary to osteoporotic burst fractures. J Spinal Disord Tech. 2005 Oct; 18(5):413-9. PMID: 16189453.
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    167. Singh K, An HS, Samartzis D, Nassr A, Provus J, Hickey M, Andersson GB. A prospective cohort analysis of adjacent vertebral body bone mineral density in lumbar surgery patients with or without instrumented posterolateral fusion: a 9- to 12-year follow-up. Spine (Phila Pa 1976). 2005 Aug 01; 30(15):1750-5. PMID: 16094277.
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    168. Samartzis D, Shen FH, Goldberg EJ, An HS. Is autograft the gold standard in achieving radiographic fusion in one-level anterior cervical discectomy and fusion with rigid anterior plate fixation? Spine (Phila Pa 1976). 2005 Aug 01; 30(15):1756-61. PMID: 16094278.
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    169. Singh K, Samartzis D, An HS. Neurofibromatosis type I with severe dystrophic kyphoscoliosis and its operative management via a simultaneous anterior-posterior approach: a case report and review of the literature. Spine J. 2005 Jul-Aug; 5(4):461-6. PMID: 15996618.
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    170. Kim KW, Ha KY, Park JB, Woo YK, Chung HN, An HS. Expressions of membrane-type I matrix metalloproteinase, Ki-67 protein, and type II collagen by chondrocytes migrating from cartilage endplate into nucleus pulposus in rat intervertebral discs: a cartilage endplate-fracture model using an intervertebral disc organ culture. Spine (Phila Pa 1976). 2005 Jun 15; 30(12):1373-8. PMID: 15959365.
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    171. Kim KW, Kim YS, Ha KY, Woo YK, Park JB, Park WS, An HS. An autocrine or paracrine Fas-mediated counterattack: a potential mechanism for apoptosis of notochordal cells in intact rat nucleus pulposus. Spine (Phila Pa 1976). 2005 Jun 01; 30(11):1247-51. PMID: 15928547.
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    172. Zhang Y, An HS, Toofanfard M, Li Z, Andersson GB, Thonar EJ. Low-dose interleukin-1 partially counteracts osteogenic protein-1-induced proteoglycan synthesis by adult bovine intervertebral disk cells. Am J Phys Med Rehabil. 2005 May; 84(5):322-9. PMID: 15829778.
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    173. Takegami K, An HS, Kumano F, Chiba K, Thonar EJ, Singh K, Masuda K. Osteogenic protein-1 is most effective in stimulating nucleus pulposus and annulus fibrosus cells to repair their matrix after chondroitinase ABC-induced in vitro chemonucleolysis. Spine J. 2005 May-Jun; 5(3):231-8. PMID: 15863076.
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    174. Hasegawa T, Inufusa A, Imai Y, Mikawa Y, Lim TH, An HS. Hydroxyapatite-coating of pedicle screws improves resistance against pull-out force in the osteoporotic canine lumbar spine model: a pilot study. Spine J. 2005 May-Jun; 5(3):239-43. PMID: 15863077.
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    175. Aota Y, An HS, Homandberg G, Thonar EJ, Andersson GB, Pichika R, Masuda K. Differential effects of fibronectin fragment on proteoglycan metabolism by intervertebral disc cells: a comparison with articular chondrocytes. Spine (Phila Pa 1976). 2005 Apr 01; 30(7):722-8. PMID: 15803072.
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    176. Samartzis D, Khanna N, Shen FH, An HS. Update on bone morphogenetic proteins and their application in spine surgery. J Am Coll Surg. 2005 Feb; 200(2):236-48. PMID: 15664100.
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    177. Shuff C, An HS. Artificial disc replacement: the new solution for discogenic low back pain? Am J Orthop (Belle Mead NJ). 2005 Jan; 34(1):8-12. PMID: 15707133.
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    178. An HS, Takegami K, Kamada H, Nguyen CM, Thonar EJ, Singh K, Andersson GB, Masuda K. Intradiscal administration of osteogenic protein-1 increases intervertebral disc height and proteoglycan content in the nucleus pulposus in normal adolescent rabbits. Spine (Phila Pa 1976). 2005 Jan 01; 30(1):25-31; discussion 31-2. PMID: 15626976.
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    179. Masuda K, Aota Y, Muehleman C, Imai Y, Okuma M, Thonar EJ, Andersson GB, An HS. A novel rabbit model of mild, reproducible disc degeneration by an anulus needle puncture: correlation between the degree of disc injury and radiological and histological appearances of disc degeneration. Spine (Phila Pa 1976). 2005 Jan 01; 30(1):5-14. PMID: 15626974.
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    180. An HS. Focus on the spine. Am J Orthop (Belle Mead NJ). 2005 Jan; 34(1):7. PMID: 15707132.
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    181. Masuda K, Oegema TR, An HS. Growth factors and treatment of intervertebral disc degeneration. Spine (Phila Pa 1976). 2004 Dec 01; 29(23):2757-69. PMID: 15564925.
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    182. An HS, Anderson PA, Haughton VM, Iatridis JC, Kang JD, Lotz JC, Natarajan RN, Oegema TR, Roughley P, Setton LA, Urban JP, Videman T, Andersson GB, Weinstein JN. Introduction: disc degeneration: summary. Spine (Phila Pa 1976). 2004 Dec 01; 29(23):2677-8. PMID: 15564916.
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    183. Shen FH, Samartzis D, Jenis LG, An HS. Rheumatoid arthritis: evaluation and surgical management of the cervical spine. Spine J. 2004 Nov-Dec; 4(6):689-700. PMID: 15541704.
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    184. Shen FH, Samartzis D, Khanna N, Goldberg EJ, An HS. Comparison of clinical and radiographic outcome in instrumented anterior cervical discectomy and fusion with or without direct uncovertebral joint decompression. Spine J. 2004 Nov-Dec; 4(6):629-35. PMID: 15541694.
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    185. Masuda K, An HS. Growth factors and the intervertebral disc. Spine J. 2004 Nov-Dec; 4(6 Suppl):330S-340S. PMID: 15541686.
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    186. Samartzis D, Shen FH, Lyon C, Phillips M, Goldberg EJ, An HS. Does rigid instrumentation increase the fusion rate in one-level anterior cervical discectomy and fusion? Spine J. 2004 Nov-Dec; 4(6):636-43. PMID: 15541695.
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    187. Zhang Y, An HS, Song S, Toofanfard M, Masuda K, Andersson GB, Thonar EJ. Growth factor osteogenic protein-1: differing effects on cells from three distinct zones in the bovine intervertebral disc. Am J Phys Med Rehabil. 2004 Jul; 83(7):515-21. PMID: 15213475.
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    188. Vermes C, Chandrasekaran R, Dobai JG, Jacobs JJ, Andersson GB, An H, Hallab NJ, Galante JO, Glant TT. The combination of pamidronate and calcitriol reverses particle- and TNF-alpha-induced altered functions of bone-marrow-derived stromal cells with osteoblastic phenotype. J Bone Joint Surg Br. 2004 Jul; 86(5):759-70. PMID: 15274277.
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    189. Renner SM, Lim TH, Kim WJ, Katolik L, An HS, Andersson GB. Augmentation of pedicle screw fixation strength using an injectable calcium phosphate cement as a function of injection timing and method. Spine (Phila Pa 1976). 2004 Jun 01; 29(11):E212-6. PMID: 15167670.
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    190. Kim KW, Chung JW, Park JB, Song SW, Ha KY, An HS. The course of the nerve root in the neural foramen and its relationship with foraminal entrapment or impingement in adult patients with lumbar isthmic spondylolisthesis and radicular pain. J Spinal Disord Tech. 2004 Jun; 17(3):220-5. PMID: 15167338.
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    191. Singh K, Vaccaro AR, Kim J, Lorenz EP, Lim TH, An HS. Enhancement of stability following anterior cervical corpectomy: a biomechanical study. Spine (Phila Pa 1976). 2004 Apr 15; 29(8):845-9. PMID: 15082982.
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    192. An HS, Singh K, Vaccaro AR, Wang G, Yoshida H, Eck J, McGrady L, Lim TH. Biomechanical evaluation of contemporary posterior spinal internal fixation configurations in an unstable burst-fracture calf spine model: special references of hook configurations and pedicle screws. Spine (Phila Pa 1976). 2004 Feb 01; 29(3):257-62. PMID: 14752346.
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    193. Samartzis D, Shen FH, Matthews DK, Yoon ST, Goldberg EJ, An HS. Comparison of allograft to autograft in multilevel anterior cervical discectomy and fusion with rigid plate fixation. Spine J. 2003 Nov-Dec; 3(6):451-9. PMID: 14609689.
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    194. Singh K, Vaccaro AR, Kim J, Lorenz EP, Lim TH, An HS. Biomechanical comparison of cervical spine reconstructive techniques after a multilevel corpectomy of the cervical spine. Spine (Phila Pa 1976). 2003 Oct 15; 28(20):2352-8; discussion 2358. PMID: 14560082.
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    195. Masuda K, Takegami K, An H, Kumano F, Chiba K, Andersson GB, Schmid T, Thonar E. Recombinant osteogenic protein-1 upregulates extracellular matrix metabolism by rabbit annulus fibrosus and nucleus pulposus cells cultured in alginate beads. J Orthop Res. 2003 Sep; 21(5):922-30. PMID: 12919882.
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    196. Kang JD, An H, Boden S, Phillips F, Foley K, Abdu W. Cement augmentation of osteoporotic compression fractures and intraoperative navigation: summary statement. Spine (Phila Pa 1976). 2003 Aug 01; 28(15 Suppl):S62-3. PMID: 12897476.
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    197. Sandhu HS, Boden SD, An H, Kang J, Weinstein J. BMPs and gene therapy for spinal fusion: summary statement. Spine (Phila Pa 1976). 2003 Aug 01; 28(15 Suppl):S85. PMID: 12897479.
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    198. An H, Boden SD, Kang J, Sandhu HS, Abdu W, Weinstein J. Summary statement: emerging techniques for treatment of degenerative lumbar disc disease. Spine (Phila Pa 1976). 2003 Aug 01; 28(15 Suppl):S24-5. PMID: 12897470.
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    199. An HS, Thonar EJ, Masuda K. Biological repair of intervertebral disc. Spine (Phila Pa 1976). 2003 Aug 01; 28(15 Suppl):S86-92. PMID: 12897480.
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    200. Biyani A, Andersson GB, Chaudhary H, An HS. Intradiscal electrothermal therapy: a treatment option in patients with internal disc disruption. Spine (Phila Pa 1976). 2003 Aug 01; 28(15 Suppl):S8-14. PMID: 12897468.
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    201. Weinstein JN, Boden SD, An H. Emerging technology in spine: should we rethink the past or move forward in spite of the past? Spine (Phila Pa 1976). 2003 Aug 01; 28(15 Suppl):S1. PMID: 12897466.
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    202. Ahn NU, Ahn UM, Andersson GB, An HS. Operative treatment of the patient with neck pain. Phys Med Rehabil Clin N Am. 2003 Aug; 14(3):675-92. PMID: 12948348.
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    203. Phillips FM, An H, Kang JD, Boden SD, Weinstein J. Biologic treatment for intervertebral disc degeneration: summary statement. Spine (Phila Pa 1976). 2003 Aug 01; 28(15 Suppl):S99. PMID: 12897482.
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    204. Natarajan RN, Garretson RB, Biyani A, Lim TH, Andersson GB, An HS. Effects of slip severity and loading directions on the stability of isthmic spondylolisthesis: a finite element model study. Spine (Phila Pa 1976). 2003 Jun 01; 28(11):1103-12. PMID: 12782976.
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    205. Kim KW, Lim TH, Kim JG, Jeong ST, Masuda K, An HS. The origin of chondrocytes in the nucleus pulposus and histologic findings associated with the transition of a notochordal nucleus pulposus to a fibrocartilaginous nucleus pulposus in intact rabbit intervertebral discs. Spine (Phila Pa 1976). 2003 May 15; 28(10):982-90. PMID: 12768135.
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    206. Riew KD, McCulloch JA, Delamarter RB, An HS, Ahn NU. Microsurgery for degenerative conditions of the cervical spine. Instr Course Lect. 2003; 52:497-508. PMID: 12690876.
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    207. An HS, Ahn NU. Posterior decompressive procedures for the cervical spine. Instr Course Lect. 2003; 52:471-7. PMID: 12690873.
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    208. Eck JC, Humphreys SC, Lim TH, Jeong ST, Kim JG, Hodges SD, An HS. Biomechanical study on the effect of cervical spine fusion on adjacent-level intradiscal pressure and segmental motion. Spine (Phila Pa 1976). 2002 Nov 15; 27(22):2431-4. PMID: 12435970.
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    209. Thonar E, An H, Masuda K. Compartmentalization of the matrix formed by nucleus pulposus and annulus fibrosus cells in alginate gel. Biochem Soc Trans. 2002 Nov; 30(Pt 6):874-8. PMID: 12440936.
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    210. Goldberg EJ, Singh K, Van U, Garretson R, An HS. Comparing outcomes of anterior cervical discectomy and fusion in workman's versus non-workman's compensation population. Spine J. 2002 Nov-Dec; 2(6):408-14. PMID: 14589262.
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    211. Cs-Szabo G, Ragasa-San Juan D, Turumella V, Masuda K, Thonar EJ, An HS. Changes in mRNA and protein levels of proteoglycans of the anulus fibrosus and nucleus pulposus during intervertebral disc degeneration. Spine (Phila Pa 1976). 2002 Oct 15; 27(20):2212-9. PMID: 12394896.
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    212. Nallamshetty L, Ahn NU, Ahn UM, Buchowski JM, An HS, Rose PS, Garrett ES, Erkula G, Kebaish KM, Sponseller PD. Plain radiography of the lumbosacral spine in Marfan syndrome. Spine J. 2002 Sep-Oct; 2(5):327-33. PMID: 14589463.
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    213. Lim TH, Brebach GT, Renner SM, Kim WJ, Kim JG, Lee RE, Andersson GB, An HS. Biomechanical evaluation of an injectable calcium phosphate cement for vertebroplasty. Spine (Phila Pa 1976). 2002 Jun 15; 27(12):1297-302. PMID: 12065977.
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    214. Takegami K, Thonar EJ, An HS, Kamada H, Masuda K. Osteogenic protein-1 enhances matrix replenishment by intervertebral disc cells previously exposed to interleukin-1. Spine (Phila Pa 1976). 2002 Jun 15; 27(12):1318-25. PMID: 12065981.
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    215. Lin W, Celik A, Derdeyn C, An H, Lee Y, Videen T, Ostergaard L, Powers WJ. Quantitative measurements of cerebral blood flow in patients with unilateral carotid artery occlusion: a PET and MR study. J Magn Reson Imaging. 2001 Dec; 14(6):659-67. PMID: 11747021; PMCID: PMC4102701.
    216. Lim TH, Kim JG, Fujiwara A, Yoon TT, Lee SC, Ha JW, An HS. Biomechanical evaluation of diagonal fixation in pedicle screw instrumentation. Spine (Phila Pa 1976). 2001 Nov 15; 26(22):2498-503. PMID: 11707718.
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    217. Aota Y, Onari K, An HS, Yoshikawa K. Dorsal root ganglia morphologic features in patients with herniation of the nucleus pulposus: assessment using magnetic resonance myelography and clinical correlation. Spine (Phila Pa 1976). 2001 Oct 01; 26(19):2125-32. PMID: 11698891.
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    218. Renkens KL, Payner TD, Leipzig TJ, Feuer H, Morone MA, Koers JM, Lawson KJ, Lentz R, Shuey H, Conaway GL, Andersson GB, An HS, Hickey M, Rondinone JF, Shargill NS. A multicenter, prospective, randomized trial evaluating a new hemostatic agent for spinal surgery. Spine (Phila Pa 1976). 2001 Aug 01; 26(15):1645-50. PMID: 11474348.
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    219. Zhang Y, Fu T, Xu K, An H. [Wet synthesis and characterization of fluoride-substituted hydroxyapatite]. Sheng Wu Yi Xue Gong Cheng Xue Za Zhi. 2001 Jun; 18(2):173-6. PMID: 11450527.
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    220. Fujiwara A, An HS, Lim TH, Haughton VM. Morphologic changes in the lumbar intervertebral foramen due to flexion-extension, lateral bending, and axial rotation: an in vitro anatomic and biomechanical study. Spine (Phila Pa 1976). 2001 Apr 15; 26(8):876-82. PMID: 11317109.
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    221. Lim TH, Kwon H, Jeon CH, Kim JG, Sokolowski M, Natarajan R, An HS, Andersson GB. Effect of endplate conditions and bone mineral density on the compressive strength of the graft-endplate interface in anterior cervical spine fusion. Spine (Phila Pa 1976). 2001 Apr 15; 26(8):951-6. PMID: 11317120.
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    222. Fujiwara A, Tamai K, An HS, Lim TH, Yoshida H, Kurihashi A, Saotome K. Orientation and osteoarthritis of the lumbar facet joint. Clin Orthop Relat Res. 2001 Apr; (385):88-94. PMID: 11302332.
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    223. Jenis LG, An HS, Gordin R. Foraminal stenosis of the lumbar spine: a review of 65 surgical cases. Am J Orthop (Belle Mead NJ). 2001 Mar; 30(3):205-11. PMID: 11300129.
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    224. Koh YD, Kim JO, Choi CH, An HS. Pyogenic spondylitis in an S1-S2 immobile segment. Spine (Phila Pa 1976). 2001 Mar 01; 26(5):588-9. PMID: 11242391.
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    225. Venter JC, Adams MD, Myers EW, Li PW, Mural RJ, Sutton GG, Smith HO, Yandell M, Evans CA, Holt RA, Gocayne JD, Amanatides P, Ballew RM, Huson DH, Wortman JR, Zhang Q, Kodira CD, Zheng XH, Chen L, Skupski M, Subramanian G, Thomas PD, Zhang J, Gabor Miklos GL, Nelson C, Broder S, Clark AG, Nadeau J, McKusick VA, Zinder N, Levine AJ, Roberts RJ, Simon M, Slayman C, Hunkapiller M, Bolanos R, Delcher A, Dew I, Fasulo D, Flanigan M, Florea L, Halpern A, Hannenhalli S, Kravitz S, Levy S, Mobarry C, Reinert K, Remington K, Abu-Threideh J, Beasley E, Biddick K, Bonazzi V, Brandon R, Cargill M, Chandramouliswaran I, Charlab R, Chaturvedi K, Deng Z, Di Francesco V, Dunn P, Eilbeck K, Evangelista C, Gabrielian AE, Gan W, Ge W, Gong F, Gu Z, Guan P, Heiman TJ, Higgins ME, Ji RR, Ke Z, Ketchum KA, Lai Z, Lei Y, Li Z, Li J, Liang Y, Lin X, Lu F, Merkulov GV, Milshina N, Moore HM, Naik AK, Narayan VA, Neelam B, Nusskern D, Rusch DB, Salzberg S, Shao W, Shue B, Sun J, Wang Z, Wang A, Wang X, Wang J, Wei M, Wides R, Xiao C, Yan C, Yao A, Ye J, Zhan M, Zhang W, Zhang H, Zhao Q, Zheng L, Zhong F, Zhong W, Zhu S, Zhao S, Gilbert D, Baumhueter S, Spier G, Carter C, Cravchik A, Woodage T, Ali F, An H, Awe A, Baldwin D, Baden H, Barnstead M, Barrow I, Beeson K, Busam D, Carver A, Center A, Cheng ML, Curry L, Danaher S, Davenport L, Desilets R, Dietz S, Dodson K, Doup L, Ferriera S, Garg N, Gluecksmann A, Hart B, Haynes J, Haynes C, Heiner C, Hladun S, Hostin D, Houck J, Howland T, Ibegwam C, Johnson J, Kalush F, Kline L, Koduru S, Love A, Mann F, May D, McCawley S, McIntosh T, McMullen I, Moy M, Moy L, Murphy B, Nelson K, Pfannkoch C, Pratts E, Puri V, Qureshi H, Reardon M, Rodriguez R, Rogers YH, Romblad D, Ruhfel B, Scott R, Sitter C, Smallwood M, Stewart E, Strong R, Suh E, Thomas R, Tint NN, Tse S, Vech C, Wang G, Wetter J, Williams S, Williams M, Windsor S, Winn-Deen E, Wolfe K, Zaveri J, Zaveri K, Abril JF, Guigó R, Campbell MJ, Sjolander KV, Karlak B, Kejariwal A, Mi H, Lazareva B, Hatton T, Narechania A, Diemer K, Muruganujan A, Guo N, Sato S, Bafna V, Istrail S, Lippert R, Schwartz R, Walenz B, Yooseph S, Allen D, Basu A, Baxendale J, Blick L, Caminha M, Carnes-Stine J, Caulk P, Chiang YH, Coyne M, Dahlke C, Mays A, Dombroski M, Donnelly M, Ely D, Esparham S, Fosler C, Gire H, Glanowski S, Glasser K, Glodek A, Gorokhov M, Graham K, Gropman B, Harris M, Heil J, Henderson S, Hoover J, Jennings D, Jordan C, Jordan J, Kasha J, Kagan L, Kraft C, Levitsky A, Lewis M, Liu X, Lopez J, Ma D, Majoros W, McDaniel J, Murphy S, Newman M, Nguyen T, Nguyen N, Nodell M, Pan S, Peck J, Peterson M, Rowe W, Sanders R, Scott J, Simpson M, Smith T, Sprague A, Stockwell T, Turner R, Venter E, Wang M, Wen M, Wu D, Wu M, Xia A, Zandieh A, Zhu X. The sequence of the human genome. Science. 2001 Feb 16; 291(5507):1304-51. PMID: 11181995.
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    226. Chen BH, Natarajan RN, An HS, Andersson GB. Comparison of biomechanical response to surgical procedures used for cervical radiculopathy: posterior keyhole foraminotomy versus anterior foraminotomy and discectomy versus anterior discectomy with fusion. J Spinal Disord. 2001 Feb; 14(1):17-20. PMID: 11242270.
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    227. Vaccaro AR, Sharan AD, Tuan RS, Kang JD, An HS, Morone MA, Savas PE, Hilibrand AS, Abitbol JJ. The use of biologic materials in spinal fusion. Orthopedics. 2001 Feb; 24(2):191-7; quiz 198-9. PMID: 11284605.
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    228. Tanaka N, An HS, Lim TH, Fujiwara A, Jeon CH, Haughton VM. The relationship between disc degeneration and flexibility of the lumbar spine. Spine J. 2001 Jan-Feb; 1(1):47-56. PMID: 14588368.
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    229. Do Koh Y, Lim TH, Won You J, Eck J, An HS. A biomechanical comparison of modern anterior and posterior plate fixation of the cervical spine. Spine (Phila Pa 1976). 2001 Jan 01; 26(1):15-21. PMID: 11148640.
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    230. An HS, Andersson G, Lieberman I, Riew D, Transfeldt E. Minimally invasive surgery for lumbar degenerative disorders: Part II. Degenerative disc disease and lumbar stenosis. Am J Orthop (Belle Mead NJ). 2000 Dec; 29(12):937-42. PMID: 11140348.
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    231. Fujiwara A, Lim TH, An HS, Tanaka N, Jeon CH, Andersson GB, Haughton VM. The effect of disc degeneration and facet joint osteoarthritis on the segmental flexibility of the lumbar spine. Spine (Phila Pa 1976). 2000 Dec 01; 25(23):3036-44. PMID: 11145815.
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    232. An HS, Andersson G, Lieberman I, Riew D, Transfeldt E. Minimally invasive surgery for lumbar degenerative disorders. Part I. Indications and patient selection; surgical procedures for herniated discs. Am J Orthop (Belle Mead NJ). 2000 Nov; 29(11):856-62. PMID: 11079103.
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    233. Fujiwara A, Tamai K, Yoshida H, Kurihashi A, Saotome K, An HS, Lim TH. Anatomy of the iliolumbar ligament. Clin Orthop Relat Res. 2000 Nov; (380):167-72. PMID: 11064987.
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    234. Jenis LG, An HS, Simpson JM. A prospective comparison of the standard and reverse robinson cervical grafting techniques: radiographic and clinical analyses. J Spinal Disord. 2000 Oct; 13(5):369-73. PMID: 11052344.
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    235. Fujiwara A, Tamai K, An HS, Kurihashi T, Lim TH, Yoshida H, Saotome K. The relationship between disc degeneration, facet joint osteoarthritis, and stability of the degenerative lumbar spine. J Spinal Disord. 2000 Oct; 13(5):444-50. PMID: 11052356.
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    236. Jenis LG, An HS. Neck pain secondary to radiculopathy of the fourth cervical root: an analysis of 12 surgically treated patients. J Spinal Disord. 2000 Aug; 13(4):345-9. PMID: 10941895.
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    237. Jenis LG, An HS, Stein R, Young B. Prospective comparison of the effect of direct current electrical stimulation and pulsed electromagnetic fields on instrumented posterolateral lumbar arthrodesis. J Spinal Disord. 2000 Aug; 13(4):290-6. PMID: 10941887.
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    238. An H, Lin W. Quantitative measurements of cerebral blood oxygen saturation using magnetic resonance imaging. J Cereb Blood Flow Metab. 2000 Aug; 20(8):1225-36. PMID: 10950383; PMCID: PMC4096835.
    239. Natarajan RN, Chen BH, An HS, Andersson GB. Anterior cervical fusion: a finite element model study on motion segment stability including the effect of osteoporosis. Spine (Phila Pa 1976). 2000 Apr 15; 25(8):955-61. PMID: 10767808.
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    240. Hasegawa T, An HS, Inufusa A, Mikawa Y, Watanabe R. The effect of age on inflammatory responses and nerve root injuries after lumbar disc herniation: an experimental study in a canine model. Spine (Phila Pa 1976). 2000 Apr 15; 25(8):937-40. PMID: 10767805.
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    241. Lee SW, Lim TH, You JW, An HS. Biomechanical effect of anterior grafting devices on the rotational stability of spinal constructs. J Spinal Disord. 2000 Apr; 13(2):150-5. PMID: 10780691.
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    242. Jenis LG, An HS. Spine update. Lumbar foraminal stenosis. Spine (Phila Pa 1976). 2000 Feb 01; 25(3):389-94. PMID: 10703115.
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    243. Fujiwara A, Tamai K, An HS, Shimizu K, Yoshida H, Saotome K. The interspinous ligament of the lumbar spine. Magnetic resonance images and their clinical significance. Spine (Phila Pa 1976). 2000 Feb 01; 25(3):358-63. PMID: 10703110.
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    244. Tanaka N, Fujimoto Y, An HS, Ikuta Y, Yasuda M. The anatomic relation among the nerve roots, intervertebral foramina, and intervertebral discs of the cervical spine. Spine (Phila Pa 1976). 2000 Feb 01; 25(3):286-91. PMID: 10703098.
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    245. Haughton VM, Schmidt TA, Keele K, An HS, Lim TH. Flexibility of lumbar spinal motion segments correlated to type of tears in the annulus fibrosus. J Neurosurg. 2000 Jan; 92(1 Suppl):81-6. PMID: 10616062.
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    246. An HS, Wise JJ, Xu R. Anatomy of the cervicothoracic junction: a study of cadaveric dissection, cryomicrotomy, and magnetic resonance imaging. J Spinal Disord. 1999 Dec; 12(6):519-25. PMID: 10598995.
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    247. Ni WD, An H, Jiang DM. [Comparative study on osteogenesis of three types growth factors recombination artificial bones]. Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi. 1999 Sep; 13(5):315-20. PMID: 12080826.
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    248. An HS, Simpson JM, Stein R. Outpatient laminotomy and discectomy. J Spinal Disord. 1999 Jun; 12(3):192-6. PMID: 10382771.
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    249. Haughton VM, Lim TH, An H. Intervertebral disk appearance correlated with stiffness of lumbar spinal motion segments. AJNR Am J Neuroradiol. 1999 Jun-Jul; 20(6):1161-5. PMID: 10445464.
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    250. Jenis LG, Dunn EJ, An HS. Metastatic disease of the cervical spine. A review. Clin Orthop Relat Res. 1999 Feb; (359):89-103. PMID: 10078132.
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    251. Fujiwara A, Tamai K, Yamato M, An HS, Yoshida H, Saotome K, Kurihashi A. The relationship between facet joint osteoarthritis and disc degeneration of the lumbar spine: an MRI study. Eur Spine J. 1999; 8(5):396-401. PMID: 10552323; PMCID: PMC3611192.
    252. An HS. Cervical spine trauma. Spine (Phila Pa 1976). 1998 Dec 15; 23(24):2713-29. PMID: 9879097.
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    253. Schmidt TA, An HS, Lim TH, Nowicki BH, Haughton VM. The stiffness of lumbar spinal motion segments with a high-intensity zone in the anulus fibrosus. Spine (Phila Pa 1976). 1998 Oct 15; 23(20):2167-73. PMID: 9802156.
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    254. Nguyen-minh C, Haughton VM, Papke RA, An H, Censky SC. Measuring diffusion of solutes into intervertebral disks with MR imaging and paramagnetic contrast medium. AJNR Am J Neuroradiol. 1998 Oct; 19(9):1781-4. PMID: 9802505.
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    255. Humphreys SC, An HS, Eck JC, Coppes M, Lim TH, Estkowski L. Oblique MRI as a useful adjunct in evaluation of cervical foraminal impingement. J Spinal Disord. 1998 Aug; 11(4):295-9. PMID: 9726297.
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    256. Nguyen-minh C, Haughton VM, An HS, You JW, Wook S, Ho KC. Contrast media of high and low molecular weights in the detection of recurrent herniated disks. AJNR Am J Neuroradiol. 1998 May; 19(5):889-93. PMID: 9613505.
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    257. An HS, Benoit PR. Saline injection technique to confirm pedicle screw path: a cadaveric study. Am J Orthop (Belle Mead NJ). 1998 May; 27(5):362-5. PMID: 9604108.
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    258. Andreshak TG, An HS, Hall J, Stein B. Lumbar spine surgery in the obese patient. J Spinal Disord. 1997 Oct; 10(5):376-9. PMID: 9355052.
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    259. Lim TH, Eck JC, An HS, McGrady LM, Harris GF, Haughton VM. A noninvasive, three-dimensional spinal motion analysis method. Spine (Phila Pa 1976). 1997 Sep 01; 22(17):1996-2000. PMID: 9306529.
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    260. Nguyen-minh C, Riley L, Ho KC, Xu R, An H, Haughton VM. Effect of degeneration of the intervertebral disk on the process of diffusion. AJNR Am J Neuroradiol. 1997 Mar; 18(3):435-42. PMID: 9090399.
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    261. Lim TH, An HS, Hong JH, Ahn JY, You JW, Eck J, McGrady LM. Biomechanical evaluation of anterior and posterior fixations in an unstable calf spine model. Spine (Phila Pa 1976). 1997 Feb 01; 22(3):261-6. PMID: 9051887.
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    262. An HS, Coppes MA. Posterior cervical fixation for fracture and degenerative disc disease. Clin Orthop Relat Res. 1997 Feb; (335):101-11. PMID: 9020210.
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    263. Vaccaro AR, An HS, Betz RR, Cotler JM, Balderston RA. The management of acute spinal trauma: prehospital and in-hospital emergency care. Instr Course Lect. 1997; 46:113-25. PMID: 9143955.
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    264. Inufusa A, An HS, Lim TH, Hasegawa T, Haughton VM, Nowicki BH. Anatomic changes of the spinal canal and intervertebral foramen associated with flexion-extension movement. Spine (Phila Pa 1976). 1996 Nov 01; 21(21):2412-20. PMID: 8923625.
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    265. An HS. Cervical root entrapment. Hand Clin. 1996 Nov; 12(4):719-30. PMID: 8953291.
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    266. Nowicki BH, Haughton VM, Schmidt TA, Lim TH, An HS, Riley LH, Yu L, Hong JW. Occult lumbar lateral spinal stenosis in neural foramina subjected to physiologic loading. AJNR Am J Neuroradiol. 1996 Oct; 17(9):1605-14. PMID: 8896609.
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    267. Infusa A, An HS, Glover JM, McGrady L, Lim TH, Riley LH. The ideal amount of lumbar foraminal distraction for pedicle screw instrumentation. Spine (Phila Pa 1976). 1996 Oct 01; 21(19):2218-23. PMID: 8902965.
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    268. Lim TH, Eck JC, An HS, Hong JH, Ahn JY, You JW. Biomechanics of transfixation in pedicle screw instrumentation. Spine (Phila Pa 1976). 1996 Oct 01; 21(19):2224-9. PMID: 8902966.
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    269. Ebraheim NA, An HS, Xu R, Ahmad M, Yeasting RA. The quantitative anatomy of the cervical nerve root groove and the intervertebral foramen. Spine (Phila Pa 1976). 1996 Jul 15; 21(14):1619-23. PMID: 8839462.
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    270. Hasegawa T, Mikawa Y, Watanabe R, An HS. Morphometric analysis of the lumbosacral nerve roots and dorsal root ganglia by magnetic resonance imaging. Spine (Phila Pa 1976). 1996 May 01; 21(9):1005-9. PMID: 8724082.
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    271. Nguyen CM, Ho KC, An H, Riley LH, Rongming X, Haughton VM. Ionic versus nonionic paramagnetic contrast media in differentiating between scar and herniated disk. AJNR Am J Neuroradiol. 1996 Mar; 17(3):501-5. PMID: 8881245.
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    272. Lim TH, An HS, Hasegawa T, McGrady L, Hasanoglu KY, Wilson CR. Prediction of fatigue screw loosening in anterior spinal fixation using dual energy x-ray absorptiometry. Spine (Phila Pa 1976). 1995 Dec 01; 20(23):2565-8; discussion 2569. PMID: 8610251.
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    273. An HS, Simpson JM, Glover JM, Stephany J. Comparison between allograft plus demineralized bone matrix versus autograft in anterior cervical fusion. A prospective multicenter study. Spine (Phila Pa 1976). 1995 Oct 15; 20(20):2211-6. PMID: 8545714.
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    274. Toth JM, An HS, Lim TH, Ran Y, Weiss NG, Lundberg WR, Xu RM, Lynch KL. Evaluation of porous biphasic calcium phosphate ceramics for anterior cervical interbody fusion in a caprine model. Spine (Phila Pa 1976). 1995 Oct 15; 20(20):2203-10. PMID: 8545713.
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    275. An HS, Lim TH, You JW, Hong JH, Eck J, McGrady L. Biomechanical evaluation of anterior thoracolumbar spinal instrumentation. Spine (Phila Pa 1976). 1995 Sep 15; 20(18):1979-83. PMID: 8578371.
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    276. An HS, Andreshak TG, Nguyen C, Williams A, Daniels D. Can we distinguish between benign versus malignant compression fractures of the spine by magnetic resonance imaging? Spine (Phila Pa 1976). 1995 Aug 15; 20(16):1776-82. PMID: 7502133.
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    277. Vaccaro AR, Rizzolo SJ, Balderston RA, Allardyce TJ, Garfin SR, Dolinskas C, An HS. Placement of pedicle screws in the thoracic spine. Part II: An anatomical and radiographic assessment. J Bone Joint Surg Am. 1995 Aug; 77(8):1200-6. PMID: 7642665.
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    278. An HS, Lynch K, Toth J. Prospective comparison of autograft vs. allograft for adult posterolateral lumbar spine fusion: differences among freeze-dried, frozen, and mixed grafts. J Spinal Disord. 1995 Apr; 8(2):131-5. PMID: 7606120.
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    279. Lim TH, An HS, Evanich C, Hasanoglu KY, McGrady L, Wilson CR. Strength of anterior vertebral screw fixation in relationship to bone mineral density. J Spinal Disord. 1995 Apr; 8(2):121-5. PMID: 7606118.
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    280. Nguyen C, Haughton VM, Ho KC, An HS, Myklebust JB, Hasegawa T, Xu R, Harb JM. Contrast enhancement in spinal nerve roots: an experimental study. AJNR Am J Neuroradiol. 1995 Feb; 16(2):265-8. PMID: 7726071.
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    281. Hasegawa T, An HS, Haughton VM, Nowicki BH. Lumbar foraminal stenosis: critical heights of the intervertebral discs and foramina. A cryomicrotome study in cadavera. J Bone Joint Surg Am. 1995 Jan; 77(1):32-8. PMID: 7822353.
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    282. An HS, Vaccaro A, Cotler JM, Lin S. Spinal disorders at the cervicothoracic junction. Spine (Phila Pa 1976). 1994 Nov 15; 19(22):2557-64. PMID: 7855681.
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    283. An HS, Xu R, Lim TH, McGrady L, Wilson C. Prediction of bone graft strength using dual-energy radiographic absorptiometry. Spine (Phila Pa 1976). 1994 Oct 15; 19(20):2358-62; discussion 2362-3. PMID: 7846582.
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    284. An HS, Nguyen C, Haughton VM, Ho KC, Hasegawa T. Gadolinium-enhancement characteristics of magnetic resonance imaging in distinguishing herniated intervertebral disc versus scar in dogs. Spine (Phila Pa 1976). 1994 Sep 15; 19(18):2089-94; discussion 2095. PMID: 7825051.
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    285. Nguyen C, An H, Ho KC, Haughton VM, Hasegawa T. Utility of high-dose contrast enhancement for detecting recurrent herniated intervertebral disks. AJNR Am J Neuroradiol. 1994 Aug; 15(7):1291-7. PMID: 7976941.
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    286. Simpson JM, Silveri CP, Balderston RA, Simeone FA, An HS. The results of operations on the lumbar spine in patients who have diabetes mellitus. J Bone Joint Surg Am. 1993 Dec; 75(12):1823-9. PMID: 8258554.
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    287. An HS, Haughton VM. Nondiscogenic lumbar radiculopathy: imaging considerations. Semin Ultrasound CT MR. 1993 Dec; 14(6):414-24. PMID: 8297634.
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    288. Hasegawa T, An HS, Haughton VM. Imaging anatomy of the lateral lumbar spinal canal. Semin Ultrasound CT MR. 1993 Dec; 14(6):404-13. PMID: 8297633.
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    289. Vaccaro AR, An HS, Cotler JM, Ahmad S, Jordan AG. Recurrent cervical subluxations in a patient with gout and endstage renal disease. Orthopedics. 1993 Nov; 16(11):1273-6. PMID: 8290403.
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    290. An HS, Evanich CJ, Nowicki BH, Haughton VM. Ideal thickness of Smith-Robinson graft for anterior cervical fusion. A cadaveric study with computed tomographic correlation. Spine (Phila Pa 1976). 1993 Oct 15; 18(14):2043-7. PMID: 8272957.
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    291. Simpson JM, Silveri CP, Simeone FA, Balderston RA, An HS. Thoracic disc herniation. Re-evaluation of the posterior approach using a modified costotransversectomy. Spine (Phila Pa 1976). 1993 Oct 01; 18(13):1872-7. PMID: 8235875.
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    292. Albert TJ, Balderston RA, Heller JG, Herkowitz HN, Garfin SR, Tomany K, An HS, Simeone FA. Upper lumbar disc herniations. J Spinal Disord. 1993 Aug; 6(4):351-9. PMID: 8219549.
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    293. Albert TJ, Levine MJ, An HS, Cotler JM, Balderston RA. Concomitant noncontiguous thoracolumbar and sacral fractures. Spine (Phila Pa 1976). 1993 Aug; 18(10):1285-91. PMID: 8211360.
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    294. Nguyen CM, Haughton VM, Ho KC, An HS. MR contrast enhancement: an experimental study in postlaminectomy epidural fibrosis. AJNR Am J Neuroradiol. 1993 Jul-Aug; 14(4):997-1002. PMID: 8352176.
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    295. An HS, Munk R. Osteomyelitis of the posterior elements of the cervical spine in an infant. Orthopedics. 1993 May; 16(5):618-20. PMID: 8327390.
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    296. Cotler JM, Herbison GJ, Nasuti JF, Ditunno JF, An H, Wolff BE. Closed reduction of traumatic cervical spine dislocation using traction weights up to 140 pounds. Spine (Phila Pa 1976). 1993 Mar 01; 18(3):386-90. PMID: 8475443.
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    297. Vaccaro AR, An HS, Lin S, Sun S, Balderston RA, Cotler JM. Noncontiguous injuries of the spine. J Spinal Disord. 1992 Sep; 5(3):320-9. PMID: 1520991.
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    298. An HS, Simpson JM, Ebraheim NA, Jackson WT, Moore J, O'Malley NP. Low lumbar burst fractures: comparison between conservative and surgical treatments. Orthopedics. 1992 Mar; 15(3):367-73. PMID: 1553331.
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    299. An HS, Gordin R, Renner K. Anatomic considerations for plate-screw fixation of the cervical spine. Spine (Phila Pa 1976). 1991 Oct; 16(10 Suppl):S548-51. PMID: 1801270.
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    300. An HS, Vaccaro AR, Dolinskas CA, Cotler JM, Balderston RA, Bauerle WB. Differentiation between spinal tumors and infections with magnetic resonance imaging. Spine (Phila Pa 1976). 1991 Aug; 16(8 Suppl):S334-8. PMID: 1785083.
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    301. Ebraheim NA, Rusin JJ, An HS, Coombs RJ, Jackson WT, Munk RL. Percutaneous computed tomography stabilization of moderate to severe slipped capital femoral epiphysis. Orthopedics. 1991 Aug; 14(8):859-63; discussion 863-4. PMID: 1923967.
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    302. An HS, Vaccaro A, Cotler JM, Lin S. Low lumbar burst fractures. Comparison among body cast, Harrington rod, Luque rod, and Steffee plate. Spine (Phila Pa 1976). 1991 Aug; 16(8 Suppl):S440-4. PMID: 1838448.
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    303. Kupcha PC, An HS, Cotler JM. Gunshot wounds to the cervical spine. Spine (Phila Pa 1976). 1990 Oct; 15(10):1058-63. PMID: 2263972.
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    304. Li Q, Zhu B, Li L, An H, Wang J. [Mutagenesis of vitamin B2 producer by using protoplasts]. Wei Sheng Wu Xue Bao. 1990 Aug; 30(4):312-3. PMID: 2251828.
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    305. An HS, Vaccaro A, Simeone FA, Balderston RA, O'Neill D. Herniated lumbar disc in patients over the age of fifty. J Spinal Disord. 1990 Jun; 3(2):143-6. PMID: 2151986.
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    306. Simpson JM, Ebraheim NA, An HS, Jackson WT. Posterolateral bone graft of the tibia. Clin Orthop Relat Res. 1990 Feb; (251):200-6. PMID: 2295176.
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    307. An HS, Wojcieszek JM, Cooke RF, Limbird R, Jackson WT. Simultaneous ipsilateral intertrochanteric and subcapital fracture of the hip. A case report. Orthopedics. 1989 May; 12(5):721-3. PMID: 2657683.
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    308. An HS, Loder RT. Intraarticular entrapment of a displaced olecranon fracture. A case report. Orthopedics. 1989 Feb; 12(2):289-91. PMID: 2922364.
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    309. Ebraheim NA, An HS, Jackson WT, Brown JA. Internal fixation of the unstable cervical spine using posterior Roy-Camille plates: preliminary report. J Orthop Trauma. 1989; 3(1):23-8. PMID: 2709200.
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    310. An HS, Ebraheim NA, Savolaine ER, Fenton P, Poka A, Jackson WT. The value of internal oblique radiographs for posterolateral bone grafting of the tibia. Clin Orthop Relat Res. 1989 Jan; (238):209-10. PMID: 2642774.
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    311. An HS, Southworth SR, Jackson WT, Russ B. Cigarette smoking and Dupuytren's contracture of the hand. J Hand Surg Am. 1988 Nov; 13(6):872-4. PMID: 3225413.
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    312. An HS, Jackson WT, Hawthorne KB. Osteolysis of the pubic bone simulating malignancy. A case report and review of literature. Orthopedics. 1988 Jun; 11(6):951-4. PMID: 3290874.
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    313. An HS, Hawthorne KB, Jackson WT. Reflex sympathetic dystrophy and cigarette smoking. J Hand Surg Am. 1988 May; 13(3):458-60. PMID: 3379291.
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    314. Ebraheim NA, An HS, Jackson WT, Pearlstein SR, Burgess A, Tscherne H, Hass N, Kellam J, Wipperman BU. Scapulothoracic dissociation. J Bone Joint Surg Am. 1988 Mar; 70(3):428-32. PMID: 3346268.
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    315. An HS, Vonderbrink JP, Ebraheim NA, Shiple F, Jackson WT. Open scapulothoracic dissociation with intact neurovascular status in a child. J Orthop Trauma. 1988; 2(1):36-8. PMID: 3225700.
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    316. An HS, Ebraheim N, Kim K, Jackson WT, Kane JT. Heterotopic ossification and pseudoarthrosis in the shoulder following encephalitis. A case report and review of the literature. Clin Orthop Relat Res. 1987 Jun; (219):291-8. PMID: 3107863.
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    317. An HS, Namey TC, Kim K. Essential cryoglobulinemia associated with intense and persistent synovitis of the knee. Clin Orthop Relat Res. 1987 Feb; (215):173-8. PMID: 3802635.
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    318. An HS, Jackson WT, Hawthorne K, Ebraheim N. Transient simultaneous sciatic and femoral nerve palsy secondary to iliacus and gluteal hematomas following heparinization for pulmonary embolus in a patient with posterior hip dislocation. J Orthop Trauma. 1987; 1(2):174-6. PMID: 3506594.
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    319. An HS, Simpson JM, Gale S, Jackson WT. Acute anterior compartment syndrome in the thigh: a case report and review of the literature. J Orthop Trauma. 1987; 1(2):180-2. PMID: 3506596.
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    320. An HS, Howard JM, Kim K. Fracture of heterotopic ossification of the abdominal wall. A case report. Ohio State Med J. 1985 Aug; 81(8):591-3. PMID: 2931657.
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    321. Zhang Z, Yang Q, An H, Fang D. [On some characteristics of the population development in the Shenzhen Special Economic Region]. Renkou Yanjiu. 1984 Mar 29; (2):28-31. PMID: 12159396.
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