1. Dipartimento di Neurologia e Psichiatria and IRCCS NEUROMED Institute; Sapienza, Università di Roma; Rome Italy
2. Department of Neurology; Innsbruck Medical University; Innsbruck Austria
3. Parkinson's disease and Movement Disorders Unit IRCCS, San Camillo, Venice; Milan Italy
4. Department of Neurodegenerative Diseases; Hertie-Institute for Clinical Brain Research; German Center for Neurodegenerative Diseases; University of Tübingen and DZNE; Tübingen Germany
5. Donders Institute for Brain, Cognition and Behaviour; Department of Neurology; Radboud University Nijmegen Medical Center; Nijmegen The Netherlands
6. Department of Clinical Genetics; Erasmus MC; Rotterdam The Netherlands
7. Department of Clinical Neuroscience; Imperial College London; Hammersmith Hospital; London, UK UK
8. Institute for Ageing and Health; Newcastle University; Newcastle upon Tyne UK
9. Dipartimento di Neurologia e Psichiatria; Sapienza Università di Roma; Rome Italy
10. Centro De Estudos Egas Moniz; Faculdade De Medicina De Lisboa; Lisbon Portugal
11. Movement Disorders Research Unit; Hospital Universitario Gregorio Marañón; Madrid Spain
12. Department of Neurology; Palacky University; Olomouc Czech Republic
13. Institute of Neurology CCS; School of Medicine; University of Belgrade; Belgrade Serbia
14. Movement Disorders Unit; Department of Neurology; Sant Pau Hospital; Universitat Autonoma de Barcelona and Ciberned; Barcelona Spain
15. Department of Neurology; Centre of Nervous Diseases; Philipps-University of Marburg; Marburg, Germany Germany
16. Institut für Medizinische Soziologie; Deutschland Germany
17. Department of Neurology; Movement Disorders Centre; School of Medicine and University Hospital Centre; University of Zagreb; Zagreb Croatia
18. 1st Faculty of Medicine and General University Hospital in Prague; Charles University in Prague; Praha Czech Republic
19. Institute of Neurology; University College London; London UK
20. Department of Neurology and Neurosurgery; University of Tartu; Tartu Estonia
21. Pôle des Maladies du Système Nerveux et CRICM UPMC/INSERM UMR_S975 CNRS UMR7225; Fédération de Neurologie; Hôpital de la Salpêtrière; Paris France