1. Department of Biostatistics; Mailman School of Public Health, Columbia University; New York New York USA
2. Department of Neurology; College of Physicians and Surgeons, Columbia University; New York New York USA
3. Taub Institute for Research on Alzheimer's Disease and the Aging Brain; Columbia University; New York New York USA
4. Department of Neurology; Mount Sinai Beth Israel Medical Center; New York New York USA
5. Sorbonne Universités, Université Pierre et Marie Curie (UPMC Univ) Paris 06
6. Institut National de la Santé et de la Recherche Médicale; U1127 Paris France
7. Centre National de la Recherche Scientifique; UMR 7225 Paris France
8. Institut du Cerveau et de la Moelle Epinière (ICM), Hôpital Pitié-Salpêtrière, Département des maladies du système nerveux; F-75013 Paris France
9. Department of Neurology; Institut National de la Santé et de la Recherche Médicale, Assistance-Publique Hôpitaux de Paris; CIC-1422 Hôpital Pitié-Salpêtrière, Paris France. Assistance publique - Hôpitaux de Paris (AP-HP); 75015 Paris France
10. Neurology Service; Parkinson's disease and Movement Disorders Unit, Institut Clínic de Neurociències, Hospital Clínic de Barcelona, University of Barcelona; Barcelona Spain
11. Institut d'Investigacions Biomèdiques August Pi iSunyer; Barcelona Spain
12. Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas; Barcelona Spain
13. Parkinson's Institute and Clinical Center; Sunnyvale California USA
14. Department of Medical and Molecular Genetics; Indiana University; Indianapolis Indiana USA
15. Department of Neurology; Christian-Albrechts-University of Kiel and Hertie-Institute of Clinical Brain Research, University of Tübingen; Germany
16. Department of Neurodegeneration; Hertie-Institute of Clinical Brain Research, University of Tübingen and German Center for Neurodegenerative Diseases; Germany
17. Parkinson Institute, Azienda Socio Sanitaria Territoriale (ASST) “Gaetano Pini-CTO”; Milan Italy
18. Department of Biomedical Sciences; Humanitas University; Rozzano Milan Italy
19. Humanitas Clinical and Research Center; Milan Italy
20. Department of Neurology; Donostia University Hospital, Biodonostia Research Institute; San Sebastián (Gipuzkoa) Spain
21. Centre for Networked Biomedical Research on Neurodegenerative Diseases; Madrid Spain
22. Morton and Gloria Shulman Movement Disorders Centre and the Edmond J. Safra Program in Parkinson's Research; Toronto Canada
23. Sackler School of Medicine; Sagol School for Neurosciences, Tel Aviv University; Tel Aviv Israel
24. Neurological Institute; Tel Aviv Sourasky Medical Center; Tel Aviv Israel