1. Department of Neurology Technische Universität München Munich Germany
2. German Center for Neurodegenerative Diseases Munich Germany
3. Department of Neurology Hanover Medical School Hanover Germany
4. Department of Neurology Santa Maria University Hospital of Terni Terni Italy
5. Parkinson's Disease and Movement Disorders Unit, Hospital Clínic/IDIBAPS/CIBERNED/(CB06/05/0018‐ISCIII)/European Reference Network for Rare Neurological Diseases (ERN‐RND)/Institut de Neurociències Universitat de Barcelona Catalonia Spain
6. Département des Maladies du Système Nerveux Sorbonne Universités, UPMC Univ Paris 06 INSERM UMRS_1127, CIC_1422; CNRS UMR_7225; AP‐HP; and ICM, Hôpital Pitié‐Salpêtrière Paris France
7. Faculdade de Medicina de Lisboa Lisbon Portugal
8. Department of Neurology Ludwig‐Maximilians‐Universität Munich Germany
9. Movement Disorders Department Clinic for Neurology Belgrade Serbia
10. Unidad de Trastornos del Movimiento, Servicio de Neurología y Neurofisiología Clínica, Instituto de Biomedicina de Sevilla Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla Seville Spain
11. University de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293 Bordeaux France
12. Service de Neurologie Hôpital Pellegrin, CHU de Bordeaux Bordeaux France
13. Department of Medicine University of Otago, Christchurch, and New Zealand Brain Research Institute Christchurch New Zealand
14. Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED) Madrid Spain
15. Department of Clinical Neuroscience UCL Institute of Neurology London United Kingdom
16. Department of Clinical Sciences, Division of Neurology Lund University Lund Sweden
17. Department of Clinical Neurosciences and Cambridge Centre for Parkinson‐Plus Cambridge University Cambridge United Kingdom
18. Department of Neurology Medical University Innsbruck Innsbruck Austria
19. Parkinson's Disease and Movement Disorders Department HYGEIA Hospital Athens Greece
20. Philipps University Marburg Marburg Germany
21. School of Medicine, European University of Cyprus Nicosia Cyprus
22. Department of Neurology Erasmus Medical Centre Rotterdam the Netherlands
23. Alzheimer's Disease Investigation Research Unit, CIEN Foundation, Carlos III Institute of Health Noscira SA Madrid Spain
24. Department of Neurology Rutgers Robert Wood Johnson Medical School New Brunswick New Jersey USA