1. From Cardiovascular Engineering, Inc, Waltham, Mass (G.F.M.); National Heart, Lung, and Blood Institute Framingham Study, Framingham, Mass (C.G., E.J.B., M.G.L., M.J.K., R.S.V., D.L.); Department of Mathematics and Statistics, Boston University, Boston, Mass (C.G., M.G.L., M.J.K.); Evans Department of Medicine (E.J.B., J.A.V., R.S.V., D.L.), Whitaker Cardiovascular Institute (E.J.B., J.A.V., R.S.V.), and Section of Preventive Medicine (E.J.B., R.S.V.), Boston University School of Medicine, Boston,...