1. Morton and Gloria Shulman Movement Disorders Clinic and the Edmond J. Safra Program in Parkinson's Disease, Division of Neurology, Toronto Western Hospital, University of Toronto, University Health Network; Toronto Ontario Canada
2. Parkinson's disease and Movement Disorders Center, Division of Neurology, Department of Medicine, University of Ottawa Brain and Mind Institute, The Ottawa Hospital Research Institute; Ottawa Ontario Canada (current affiliation)
3. Parkinson's Disease and Movement Disorders Program, Henry Ford Health System; West Bloomfield Michigan USA (current affiliation)
4. Department of Neurosurgery; Toronto Western Hospital, University of Toronto, University Health Network; Toronto Ontario Canada
5. Service de Neurologie, Centre Hospitalier Universitaire de Grenoble, Université Joseph Fourier; Grenoble France (current affiliation)