1. Department of Neurology David Geffen School of Medicine, University of California Los Angeles Los Angeles California USA
2. Parkinson's Disease Research, Education, and Clinical Center, Greater Los Angeles Veterans Affairs Medical Center Los Angeles California USA
3. Unshakeable MD Toronto Ontario Canada
4. Department of Neurology Radboud University Medical Center Nijmegen the Netherlands
5. Be NutritionWise Dublin Ireland
6. Grenoble Alpes University, Faculty of Medicine, Division of Neurology CHUGA, Grenoble Institute of Neurosciences Grenoble France