1. From the Neuroepidemiology Research Unit (C.W., D.E.G.), Research Institute of the McGill University Health Centre; Department of Medicine (C.W.), Faculty of Medicine and Health Sciences, Department of Epidemiology (C.W., F.I.), Biostatistics and Occupational Health, School of Population and Global Health, and Department of Pediatrics (M.O.), Faculty of Medicine and Health Sciences, McGill University, Montreal, Quebec, Canada.