From the Cardiovascular Division, Brigham and Women's Hospital, Boston, MA (M.A.P., B.C., A.S.D., E.F.L., S.D.S.); New England Research Institutes, Inc, Watertown, MA (S.F.A., S.M.M.); National Heart, Lung, and Blood Institute, Bethesda, MD (R.B., J.L.F.); VA Medical Center and University of Minnesota, Minneapolis, MN (I.S.A.); Hospital de Clinicas de Porto Alegre, Porto Alegre, Brazil (N.C.); Estudios Clinicos Latinoamerica, Rosario, Argentina (R.D.); Pirogov Russian National Research Medical University, Moscow, Russia (I.G.); New York Methodist Hospital, Brooklyn, NY (J.F.H.); Montreal Heart Institute, Montreal, QC, Canada (E.O., J.L.R.); University of Washington Medical Center, Seattle (J.L.P.); Diagnostic Services Clinic, Tbilisi, Georgia (T.S.); Northwestern University, Chicago, IL (S.J.S.); University of Wisconsin, Madison (N.K.S.); and University of Michigan School of Medicine, Ann Arbor (B.P.). mpfeffer@rics.bwh.harvard.edu. From the Cardiovascular Division, Brigham and Women's Hospital, Boston, MA (M.A.P., B.C., A.S.D., E.F.L., S.D.S.); New England Research Institutes, Inc, Watertown, MA (S.F.A., S.M.M.); National Heart, Lung, and Blood Institute, Bethesda, MD (R.B., J.L.F.); VA Medical Center and University of Minnesota, Minneapolis, MN (I.S.A.); Hospital de Clinicas de Porto Alegre, Porto Alegre, Brazil (N.C.); Estudios Clinicos Latinoamerica, Rosario, Argentina (R.D.); Pirogov Russian National Research Medical University, Moscow, Russia (I.G.); New York Methodist Hospital, Brooklyn, NY (J.F.H.); Montreal Heart Institute, Montreal, QC, Canada (E.O., J.L.R.); University of Washington Medical Center, Seattle (J.L.P.); Diagnostic Services Clinic, Tbilisi, Georgia (T.S.); Northwestern University, Chicago, IL (S.J.S.); University of Wisconsin, Madison (N.K.S.); and University of Michigan School of Medicine, Ann Arbor (B.P.).