1. From the Cardiology Unit of the Department of Medicine (A.J.M., W.Z., A.D.E., M.W.B., J.P.D., S.M., M.L.A.) and the Department of Biostatistics and Computational Biology (W.J.H.), University of Rochester Medical Center, Rochester, NY, and the Cardiology Division of the Department of Medicine (H.G., R.B.C.), St. Luke’s Roosevelt Hospital Center and Columbia University College of Physicians and Surgeons, New York, NY.