1. From the Divisions of Cardiology (P.M.R.) and Preventive Medicine (P.M.R., J.E.B., C.H.H.), Brigham and Women’s Hospital, and the Department of Ambulatory Care and Prevention (J.E.B., C.H.H.), Harvard Medical School, Boston, Mass; and Abbott Laboratories, Abbott Park, Ill (M.M., J.S.).