1. Department of Psychiatry Perelman School of Medicine University of Pennsylvania Philadelphia Pennsylvania
2. Department of Neurology Perelman School of Medicine University of Pennsylvania Philadelphia Pennsylvania
3. Parkinson’s Disease Research, Education and Clinical Center Philadelphia Veterans Affairs Medical Center Philadelphia Pennsylvania
4. Department of Biostatistics College of Public Health University of Iowa Iowa City Iowa
5. Feinberg School of Medicine Northwestern University Chicago Illinois
6. Institute of Psychiatry, Psychology and Neuroscience King’s College London London England
7. Department of Neurology Columbia University Vagelos College of Physicians and Surgeons New York New York
8. Department of Neurology Virginia Commonwealth University Richmond Virginia
9. Department of Neurology University of Pittsburgh School of Medicine Pittsburgh Pennsylvania
10. Michael J. Fox Foundation for Parkinson’s Research New York New York
11. Department of Neurology University of Cincinnati Academic Health Center Cincinnati Ohio
12. Department of Psychiatry Yale School of Medicine New Haven Connecticut
13. Lou Ruvo Center for Brain Health Cleveland Clinic Cleveland Ohio
14. UCSD Movement Disorder Center Department of Neurosciences University of California San Diego San Diego California
15. Departments of Neurology and Psychiatry School of Medicine and Dentistry University of Rochester Rochester New York
16. Department of Neurology Johns Hopkins University School of Medicine Baltimore Maryland
17. Departments of Neurology and Psychiatry & Behavioral Sciences Baylor College of Medicine Houston Texas