1. Parkinson and Movement Disorders Program, Department of Medicine, Division of Neurology University of Alberta Edmonton Alberta Canada
2. Division of Neurology, Department of Medicine, and the Mah Pooi Soo & Tan Chin Nam Centre for Parkinson's & Related Disorders, Faculty of Medicine University of Malaya Kuala Lumpur Malaysia
3. Parkinson Foundation International Centre of Excellence Kings College Hospital and Kings College, Denmark Hill Campus London United Kingdom
4. Movement Disorders Unit–Center for Rare Neurological Diseases, Department of Neuroscience University of Padua Padua Italy
5. Physical Therapy, Speech Therapy, and Occupational Therapy Department, Medical School University of Sao Paulo Sao Paulo Brazil
6. North Bristol NHS Trust Bristol United Kingdom
7. Centro de Trastornos del Movimiento, Facultad de Ciencias Médicas Universidad de Santiago de Chile Santiago Chile
8. Institute of Nursing Science and Practice Paracelsus Medical University Salzburg Austria
9. Ludwig‐Maximillians‐University Munich Germany
10. Department of Neurology Kliniku Agatharied Hausham Germany
11. Northumbria Healthcare NHS Foundation Trust Newcastle Upon Tyne United Kingdom
12. Chulalongkorn Centre of Excellence for Parkinson's Disease and Related Disorders, Department of Medicine, Faculty of Medicine Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society Bangkok Thailand
13. The Academy of Science The Royal Society of Thailand Bangkok Thailand
14. Instituto de Medicina Molecular Joao Lobo Antunes Lisbon Portugal
15. Parkinson Victoria Surrey Hills Victoria Australia