1. Department of Neurology, Inselspital University Hospital Bern, University of Bern Bern Switzerland
2. Department of Neurology University Hospital Schleswig‐Holstein, Christian‐Albrechts‐University Kiel Germany
3. Movement Disorders Unit, Neurology Service, Internal Medicine Department The Federal University of Minas Gerais Belo Horizonte Brazil
4. Department of Neurology Sorbonne Université, Paris Brain Institute (ICM), Inserm, CNRS, Assistance Publique Hôpitaux de Paris, Hôpital Pitié‐Salpêtrière Paris France
5. Movement Disorders Unit, Department of Neurology Westmead Hospital and Sydney Medical School, University of Sydney Sydney New South Wales Australia
6. Division of Neurology, Department of Medicine University of Toronto Toronto Ontario Canada
7. Edmond J. Safra Program in Parkinson's Disease and the Morton and Gloria Shulman Movement Disorders Clinic, Toronto Western Hospital, University Health Network Toronto Ontario Canada
8. Center for Networked Biomedical Research in Neurodegenerative Diseases (CIBERNED), Carlos III Institute of Health Madrid Spain
9. Neurology Department Clínica Universidad de Navarra Pamplona Spain
10. Departments of Psychiatry and Neurology Perelman School of Medicine at the University of Pennsylvania Philadelphia Pennsylvania USA
11. Parkinson's Disease Research, Education and Clinical Center (PADRECC and MIRECC), Philadelphia Veterans Affairs Medical Center Philadelphia Pennsylvania USA