1. Center for Health + Technology, University of Rochester Medical Center, Rochester, New York.
2. Department of Biostatistics and Computational Biology, University of Rochester, Rochester, New York.
3. Parkinson's Foundation, Miami, Florida.
4. Department of Neurology, University of Rochester Medical Center, Rochester, New York.
5. Eli Lilly and Company, Indianapolis, Indiana.
6. Simone Consulting, Sunnyvale, California.
7. Departments of Neurology and of Biostatistics and Epidemiology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania.
8. Division of Geriatric Medicine and Gerontology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland.