1. From the Cardiology Division, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston (J.H.W., C.O’B., D.M.B., R.W.Y.), Cardiovascular Division, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA (L.M.), Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston (G.S.), Cardiovascular Division, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA (J.B.S.),...