1. Department of Neurology; Philipps University; Marburg Germany
2. Center for Neurorehabilitation; Valens Switzerland
3. Movement Disorders Clinic; Second Department of Neurology; University of Athens; Greece
4. Service de Physiologie - Explorations Fonctionnelles; Hôpital Henri-Mondor; AP-HP; Université Paris-Est; Créteil France
5. Parkinson Center; Center for Neurological Rehabilitation; Zihlschlacht Switzerland