1. Parkinson and Movement Disorders Unit; IRCCS Hospital San Camillo; Venice Italy
2. UCB Pharma; Monheim am Rhein Germany
3. UCB Pharma; Paris France
4. Department of Neurology; Philipps University; Marburg Germany
5. Clinical Investigation Centre CIC1436; and Departments of Clinical Pharmacology and Neurosciences; INSERM and Toulouse University Hospital; Toulouse France
6. Department of Neurology; University of Dresden; Dresden Germany
7. Neurology Service; Hospital Clinic de Barcelona; Universitat de Barcelona; IDIBAPS; Centro de Investigacion Biomedica en Red sobre Enfermedades Neurodegenerativas (CIBERNED); Barcelona Catalonia Spain
8. National Parkinson Foundation International Centre of Excellence; King's College Hospital; Kings College and Kings Health Partners; London UK