1. From the Section of Cardiology (R.D.), Dartmouth Hitchcock Medical Center, Lebanon, NH; the Division of Aging (R.D., J.M.G., L.D.) and Preventive Medicine (J.M.G.), Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA; and the Massachusetts Veterans Epidemiology Research and Information Center and Geriatric Research, Education, and Clinical Center (J.M.G., L.D.), VA Boston Healthcare System, Boston, MA.