Parkinson Disease

• Keck Hospital of University of Southern California — Los Angeles, California, United States
• Rocky Mountain Movement Disorders Center, PC — Englewood, Colorado, United States
• Georgetown Universtiy, Department of Neurology — Washington D.C., District of Columbia, United States
• Parkinson's Disease and Movement Disorders Center of Boca Raton — Boca Raton, Florida, United States

• Rutgers School of Health Professions — Newark, New Jersey, United States

• University of California, San Francisco — San Francisco, California, United States
• Emory University — Atlanta, Georgia, United States
• Ohio State University — Columbus, Ohio, United States

• Laboratory of Neruomuscular Research and Active Aging — Coral Gables, Florida, United States

• Teachers College, Columbia University — New York, United States

• Oregon Health & Science Universtiy — Portland, Oregon, United States
• VA Portland Health Care System — Portland, Oregon, United States

• Home patients — Gijón, Principality of Asturias, Spain

• University of Maryland School of Medicine, Dept. of Neurology — Baltimore, Maryland, United States

• Cleveland Clinic Foundation — Cleveland, Ohio, United States

Not specified