1. Division of Neurology, Department of Medicine, Parkinson's Disease and Movement Disorders Center, The Ottawa Hospital Research Institute University of Ottawa Brain and Mind Research Institute Ottawa Ontario Canada
2. Harvard Medical School Boston Massachusetts USA
3. Biostatistics Center, Massachusetts General Hospital Boston Massachusetts USA
4. Department of Nutrition Harvard T.H. Chan School of Public Health Boston Massachusetts USA
5. Channing Division of Network Medicine Brigham and Women's Hospital and Harvard Medical Boston Massachusetts USA
6. Laboratory of Clinical Pharmacology and Therapeutics, Faculdade de Medicina Universidade de Lisboa Lisboa Portugal
7. Instituto de Medicina Molecular Lisboa Portugal
8. Edmond J. Safra Program in Parkinson's Disease and the Morton and Gloria Shulman Movement Disorders Clinic University Health Network Toronto Ontario Canada
9. Department of Medicine University of Toronto Toronto Ontario Canada
10. Department of Neurology Massachusetts General Hospital Boston Massachusetts USA