1. Department of Neurology, University of Miami Miller School of Medicine, Miami, Florida
2. Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
3. Departments of Medicine, Brigham and Women's Hospital and Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
4. Department of Neurology and Rehabilitation, University of Illinois at Chicago Medical Center, Chicago, Illinois
5. Collaborative Studies Coordinating Center, University of North Carolina at Chapel Hill, North Carolina
6. Department of Neurology and Center for Circadian and Sleep Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois