1. Department of Medicine, Massachusetts General Hospital, Boston
2. Department of Biostatistics, University of Washington, Seattle
3. Department of Epidemiology, University of Pittsburgh, Pennsylvania
4. Department of Medicine, University of California–Davis, Sacramento
5. Department of Medicine, Albert Einstein College of Medicine, Bronx, New York
6. Department of Epidemiology and Population Health, Albert Einstein College of Medicine, Bronx, New York
7. Department of Medicine, University of Pennsylvania, Philadelphia
8. Departments of Medicine and Pathology, University of Vermont, Burlington
9. New England GRECC, VA Boston Healthcare System, Boston, Massachusetts
10. Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, Massachusetts
11. Department of Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina