1. Sobell Department of Motor Neuroscience & Movement Disorders, UCL, Institute of Neurology; The National Hospital for Neurology & Neurosurgery; Queen Square London United Kingdom
2. Department of Neurology; University of Ljubljana; Slovenia
3. Department of Neurology and Psychiatry and Neuromed institute; “Sapienza” University of Rome; Italy
4. Movement Disorders Unit, Neurology Department; Hospital Universitario La Fe; Valencia Spain