1. From the Donald W. Reynolds Centers of the Brigham and Women’s Hospital (A.Z., N.G., L.M., P.L.), Harvard Medical School, Boston, Mass; and the University of Texas Southwestern Medical Center (S.A., A.K., D.K.M., G.L.V., S.G., J.d.L.), Dallas. Current affiliations: Department of Cardiology (A.Z.), University of Freiburg, Germany; Karolinska Institute (N.G.), Stockholm, Sweden; and Cardiovascular Disease (U.S.), Boehringer Ingelheim Pharmaceuticals, Ridgefield, Conn.