Non-Motor Fluctuations in Parkinson's Disease: Validation of the Non-Motor Fluctuation Assessment Questionnaire.
Kleiner G, Fernandez HH, Chou KL, Fasano A, Duque KR, Hengartner D, Law A, Margolius A, Poon YY, Sáenz Farret M, Saleh P, Vizcarra JA, Stebbins GT, Espay AJ. Non-Motor Fluctuations in Parkinson's Disease: Validation of the Non-Motor Fluctuation Assessment Questionnaire. Mov Disord. 2021 06; 36(6):1392-1400.