1. From the Cardiology Division, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA (V.K.T.); Department of Emergency Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA (E.T.); Smith Center for Outcomes Research in Cardiology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA (R.W.Y.); Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA (R.W.T., A.M.); and Massachusetts...