1. From the National Heart, Lung, and Blood Institute’s and Boston University’s Framingham Study (R.B.S., M.G.L., P.A.W., D.L., R.S.V., E.J.B.), Framingham, Mass; Mathematics and Statistics Department (M.G.L., M.J.P.), Whitaker Cardiovascular Institute (R.S.V., E.J.B.), Evans Memorial Medicine Department (J.W.M., D.L., R.S.V., E.J.B.), and Sections of Cardiology (J.W.M., D.L., R.S.V., E.J.B.), Neurology (P.A.W.), and Preventive Medicine (R.S.V., E.J.B.), Boston University School of Medicine, Boston,...