1. From the Cardiology Division, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA (R.W.Y., K.R., D.S.); the Department of Health Care Policy, Harvard Medical School, Boston, MA (K.Z., A.L., S.-L.T.N.); the Cardiology Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA (L.M.); Wellmont CVA Heart Institute, Kingsport, TN (R.S.); St Vincent Hospital, Worcester, MA (B.H.W.); the Department of Medicine, Section of...