Parkinson's Disease

• Department of Neurology, Aarhus University Hospital — Aarhus, Jutland, Denmark
• Department of Neurology , Aarhus University Hospital — Aarhus, Denmark
• Bispebjerg Hospital — Copenhagen, Denmark

Not specified

• Francine Niset — Lille, France

• Barrow Neurology Clinics at St. Joseph's Hosptial & Medical Center — Phoenix, Arizona, United States
• Coastal Neurological Medical Group, Inc — La Jolla, California, United States
• Neurosearch, Inc. — Reseda, California, United States
• University of Florida Health Science Center — Jacksonville, Florida, United States

• Beate Ritz, UCLA Department of Epidemiology — Los Angeles, California, United States

• Fondazione S. Lucia — Rome, Italy

• Beth Israel Deaconess Medical Center — Boston, Massachusetts, United States

• University of Michigan Health System — Ann Arbor, Michigan, United States

• University of California Los Angeles — Los Angeles, California, United States
• University of Florida — Gainesville, Florida, United States
• Beth Israel Deaconess Medical Center — Boston, Massachusetts, United States
• The Cleveland Clinic — Cleveland, Ohio, United States

• University of Pennsylvania, Ralston House — Philadelphia, Pennsylvania, United States