1. From Cardiovascular Engineering, Inc, Norwood, Mass (G.F.M.); National Heart, Lung, and Blood Institute’s Framingham Study, Framingham, Mass (S.H., R.S.V., M.G.L., D.L., E.J.B.); Center for Population Studies, National Heart, Lung, and Blood Institute, Bethesda, Md (S.H., D.L.); Evans Department of Medicine (R.S.V., N.M.H., J.A.V., E.J.B.), Whitaker Cardiovascular Institute (R.S.V., N.M.H., J.A.V., E.J.B.), and Section of Preventive Medicine (R.S.V., E.J.B.), Boston University School of Medicine,...