1. From the Framingham Heart Study (W.L., M.J.P., T.J.W., M.G.L., E.J.B., D.L., C.N.-C., R.S.V.), Framingham, Mass; Department of Mathematics (M.J.P., M.G.L., K.J.L.) and Preventive Medicine and Cardiology Sections (E.J.B., R.S.V.), Boston University School of Medicine, Mass; Divisions of Cardiology (T.J.W., C.N.-C.) and General Medicine (J.B.M.), Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston; National Heart, Lung, and Blood Institute (D.L.), Bethesda, Md; Royal...