1 Parkinson's disease and Movement Disorders Center, Department of Medicine, The Ottawa Hospital Research Institute, University of Ottawa, Ottawa K1Y 4E9, ON, Canada.
2 Department of Neurosciences, Padova University, Padova, Italy.
3 Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal; Campus Neurológico Sénior, Torres Vedras, Portugal.
4 HM CINAC, Hospital Universitario HM Puerta del Sur, Universidad CEU San Pablo, Madrid, Spain.
5 Dublin Neurological Institute, Mater Misericordiae University Hospital, Dublin, Ireland.
6 Services de Neurologie, Centre de Reference AMS, Centre d'Investigation Clinique, Réseau NS-Park/FCRIN et Centre of Excellence for Neurodegenerative Disorders, CHU de Toulouse, Toulouse, France.
7 Department of Neurology and Centre of Clinical Neuroscience, First Faculty of Medicine and General University Hospital, Charles University, Prague, Czech Republic.
8 Department of Neurology, University Hospital of Marburg, Marburg, Germany.
9 Parkinson's disease and Movement Disorders Center, Department of Medicine, The Ottawa Hospital Research Institute, University of Ottawa, Ottawa K1Y 4E9, ON, Canada. Electronic address: tmestre@toh.ca.