Sanofi - Massachusetts, The Tazuke Kofukai Medical Research Institute, Juntendo University, University of Tübingen, Parkinson’s Disease and Movement Disorders Center, Sanofi - Amsterdam, Sanofi - France, Sanofi - France, Sanofi - New Jersey, Sanofi - France, Department of Neurology and the Taub Institute, Columbia University, University of Alabama at Birmingham - School of Public Health, Juntendo University - Department of Neurology, Department of Neurology, Technische Universität München (TUM), Institute for Neurodegenerative Disorders, University College London - Department of Clinical and Movement Neurosciences, Harvard University - Brigham and Women's Hospital, Northwestern University, Tel Aviv Sourasky Medical Centre - Laboratory for Early Markers of Neurodegeneration, Sanofi - Massachusetts, Sanofi - Massachusetts and Independent