1. Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, Illinois
2. Research Programs, Michael J. Fox Foundation for Parkinson’s Research, New York, New York
3. Department of Neurology, Northwestern University, Chicago, Illinois
4. Department of Biostatistics, College of Public Health, University of Iowa, Iowa City
5. The Cure Parkinson’s Trust, London, England
6. Research and Development, The Cure Parkinson’s Trust, London, England
7. Van Andel Institute, Center for Neurodegenerative Science, Grand Rapids, Michigan
8. Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
9. Department of Neurology, Massachusetts General Hospital, Boston, Massachusetts
10. Consultant, Austin, Texas
11. Department of Neurology, University of Rochester, Rochester, New York
12. CHET CTCC, University of Rochester, Rochester, New York
13. Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland
14. Steven’s Institute of Technology, Marlboro, New Jersey
15. for the Parkinson Study Group NILO-PD Investigators and Collaborators