1. National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, USA
2. Pittsburgh Institute for Neurodegenerative Diseases, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
3. Veterans Affairs Pacific Islands Health Care System, Honolulu, Hawaii, USA
4. Pennsylvania State University–Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
5. Mayo Clinic, Rochester, Minnesota, USA
6. University of Virginia School of Medicine, Charlottesville, Virginia, USA
7. Harvard School of Public Health, Boston, Massachusetts, USA
8. Mayo Clinic Arizona, Scottsdale, Arizona, USA
9. Institute for Neurodegenerative Disorders, New Haven, Connecticut, USA
10. Emory University, Atlanta, Georgia, USA
11. Institute for Human Genetics, University of California, San Francisco, San Francisco, California, USA
12. Parkinson’s Action Network, Washington, DC, USA
13. University of California, Los Angeles, Los Angeles, California, USA
14. Avid Radiopharmaceuticals, Philadelphia, Pennsylvania, USA
15. The Parkinson Institute, Sunnyvale, California, USA
16. Department of Health Research and Policy, Stanford University School of Medicine, Stanford, California, USA
17. Barrow Neurological Institute, Phoenix, Arizona, USA
18. University of Washington, Seattle, Washington, USA