1. Edmond J. Safra Program in Parkinson's Disease, Morton and Gloria Shulman Movement Disorders Clinic, Toronto Western Hospital—UHN, Division of Neurology University of Toronto Toronto Ontario Canada
2. Division of Neuroradiology, Joint Department of Medical Imaging, Toronto Western Hospital University Health Network Toronto Ontario Canada
3. Movement Disorders Unit, Perron Institute of Neurological Translational Science Sir Charles Gairdner Hospital Perth Western Australia Australia
4. Apollo Hospitals Chennai India
5. Centre for Brain Health Dublin Neurological Institute at the Mater Misericordiae University Hospital Dublin Ireland
6. School of Medicine and Medical Science University College Dublin Dublin Ireland
7. Department of Neurology The Royal Free Hospital London United Kingdom
8. Northwestern Medicine Central Dupage Hospital Neurodegenerative Diseases Center Winfield Illinois USA
9. Rush University Medical Center Chicago Illinois USA
10. Parkinson's Disease Research, Education, and Clinical Care Consortium Jesse Brown VA Medical Center Chicago Illinois USA
11. First Department of Medicine Hamamatsu University School of Medicine Hamamatsu Japan
12. Kono Neurology Clinic Hamamatsu Japan
13. Department of Neurology Nizam's Institute of Medical Sciences Hyderabad India