Kabrhel C, Mark Courtney D, Camargo CA, Moore CL, Richman PB, Plewa MC, Nordenholtz KE, Smithline HA, Beam DM, Brown MD, Kline JA. Potential impact of adjusting the threshold of the quantitative D-dimer based on pretest probability of acute pulmonary embolism. Acad Emerg Med. 2009 Apr; 16(4):325-32.