1. Sobell Department of Motor Neuroscience and Movement Disorders; University College London (UCL) Institute of Neurology; London United Kingdom
2. Dipartimento di Scienze Neurologiche e del Movimento; Università di Verona, Policlinico Borgo Roma; Verona Italy
3. Queen Elizabeth Hospital; Woolwich, Lewisham and Greenwich NHS Trust; London United Kingdom
4. King's College Hospital NHS Foundation Trust; London United Kingdom
5. Center for Neuroscience and Trauma; Queen Mary University of London; London United Kingdom
6. Neurology; University Medical Center Hamburg-Eppendorf (UKE); Hamburg Germany
7. Department of Pediatric and Adult Movement Disorders and Neuropsychiatry; Institute of Neurogenetics; University of Lübeck; Lübeck Germany
8. Neurology Department; Hospital de Santo Antonio; Centro Hospitalar do Porto; Porto Portugal