1. From the Cardiovascular Engineering, Inc., Norwood, MA (L.L.C., G.F.M.); Cardiovascular Research Center, Lifespan Cardiovascular Institute, W. Alpert Medical School of Brown University, Providence, RI (L.L.C.); Data Coordinating Center (J.N.P.), Department of Epidemiology (E.J.B., R.S.V.), and Department of Biostatistics (M.G.L.), Boston University School of Public Health, MA; Boston University and the National Heart, Lung, and Blood Institute’s Framingham Study, MA (E.J.B., M.G.L., R.S.V.); and...