1. The Department of Neurology, University Hospital Bern and University of Bern, Bern, Switzerland (Aybek, Bassetti); the Edmond J. Safra Program in Parkinson's Disease and Morton and Gloria Shulman Movement Disorders Clinic, Toronto Western Hospital and University of Toronto (Lidstone, Lang); the Neuroscience Research Centre, Institute of Molecular and Clinical Sciences, St. George’s University of London (Nielsen, Edwards); and the Department of Psychiatry, University Health Network and University of...