We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleThe 39 item Parkinson's disease questionnaire (PDQ-39) revisited: implications for evidence based medicineAuthorsHagell, P.; Nygren, C.PublicationJournal of Neurology, Neurosurgery & Psychiatry, 2007, Vol 78, Issue 11, p1191ISSN0022-3050Publication typearticleDOI10.1136/jnnp.2006.111161