1. Department of Neurology, Keck/University of Southern California School of Medicine, Los Angeles, CA, USA
2. Department of Neurology, Wake Forest School of Medicine, Medical Center Blvd. Winston Salem, NC, USA
3. Department of Neurology/Movement Disorders, School of Medicine, Faculty Medical Offices, Loma Linda University, Loma Linda, CA, USA
4. Parkinson's Disease and Movement Disorders Center of Boca Raton, Boca Raton, FL, USA
5. University of South Florida Health Byrd Parkinson's Disease and Movement Disorders Center of Excellence, Tampa, FL, USA
6. Ipsen Pharma, Boulogne-Billancourt, France
7. Ipsen Biopharmaceuticals, Basking Ridge, NJ, USA
8. Methodist Neurological Institute, Houston, TX, USA