1. Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
2. Parkinson Center Nijmegen, Radboud University Medical Center, Nijmegen, The Netherlands
3. Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, The Netherlands
4. Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA
5. Department of Oral & Maxillofacial Pathology, Radiology & Medicine, New York University, College of Dentistry, New York, NY, USA
6. Department of Psychiatry, New York University School of Medicine, New York, NY, USA
7. Center for Neurodegenerative Science, Van Andel Research Institute, Grand Rapids, MI, USA
8. The Cure Parkinson’s Trust, UK, London, UK
9. Department of Epidemiology and Biostatistics, Michigan State University, East Lansing, MI, USA