1. From the Edmond J. Safra Program in Parkinson's Disease (D.G.D.L., C.M.), Movement Disorders Clinic, Krembil Brain Institute, Toronto Western Hospital; Institute of Health Policy (D.G.D.L., C.M.), Management and Evaluation, Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Division of Biostatistics and Bioinformatics (S.L., H.L.), Duke University, Durham, NC; Krembil Brain Institute (M.C.), Toronto Western Hospital, Ontario, Canada; Department of Neurology (T.L.D.),...