1. Division of General Medicine and Primary Care at the Beth Israel Deaconess Medical Center, Boston, Massachusetts
2. Department of Cardiovascular Medicine, Lahey Clinic Medical Center, Burlington, Massachusetts
3. Division of Cardiology, Maine Medical Center, Portland, Maine
4. Division of Cardiology, Massachusetts General Hospital, Boston, Massachusetts; the Departments of
5. Epidemiology and
6. Health and Social Behavior, Harvard School of Public Heath, Boston, Massachusetts
7. Division of Cardiology, Beth Israel Deaconess Medical Center, Boston, Massachusetts