1. From the Cardiology Division (J.H.W., C.O’B., R.W.Y.), Department of Medicine (J.H.W., C.O’B., R.W.Y., J.B.S.), and Laboratory of Computer Science (A.H.Z., J.L.), Massachusetts General Hospital, Harvard Medical School, Boston; Saint Luke’s Mid America Heart Institute/UMKC, Kansas City, MO (K.F.K., J.A.S.); Department of Biostatistics, Harvard School of Public Health, Boston, MA (K.Z., S.-L.T.N.); Cardiovascular Division, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School,...