1. Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, University College London , London WC1N 3BG , UK
2. UCL Movement Disorders Centre, University College London , London WC1N 3BG , UK
3. Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network , Chevy Chase, MD, 20815 , USA
4. Genetics and Genomic Medicine, UCL Great Ormond Street Institute of Child Health, University College London , London WC1N 1EH , UK
5. Population Health Sciences, Bristol Medical School, University of Bristol , Bristol BS8 2PS , UK
6. Department of Neurology, Oslo University Hospital , 0424 Oslo , Norway
7. Department of Neurodegenerative Diseases, UCL Queen Square Institute of Neurology, University College London , London WC1N 3BG , UK
8. UK Dementia Research Institute, University College London , London WC1E 6BT , UK
9. Sorbonne Université, Institut du Cerveau - Paris Brain Institute - ICM, INSERM, CNRS , 75013 Paris , France
10. Assistance Publique Hôpitaux de Paris, Department of Neurology, Hôpital Pitié-Salpêtrière , 75013 Paris , France
11. NIHR Great Ormond Street Hospital Biomedical Research Centre, University College London , London WC1N 1EH , UK
12. Institute of Psychological Medicine and Clinical Neurosciences, MRC Centre for Neuropsychiatric Genetics and Genomics, Cardiff University , Cardiff CF24 4HQ , UK
13. Centre Inria de Paris , 75012 Paris , France
14. Centre for Research in Epidemiology and Population Health, INSERM U1018, Team ‘Exposome, Heredity, Cancer, and Health’ , 94807 Villejuif , France
15. Nuffield Department of Clinical Neurosciences, Division of Clinical Neurology, University of Oxford , Oxford OX3 9DU , UK
16. Oxford Parkinson's Disease Centre, University of Oxford , Oxford OX1 3QU , UK
17. School of Neuroscience and Psychology, University of Glasgow , Glasgow G51 4TF , UK
18. Reta Lila Weston Institute, UCL Queen Square Institute of Neurology , London WC1N 1PJ , UK
19. National Institute for Health Research (NIHR) University College London Hospitals Biomedical Research Centre , London W1T 7DN , UK
20. Institute for Advanced Study, The Hong Kong University of Science and Technology , Hong Kong SAR , China