1. From the Cardiovascular Division, Beth Israel Hospital, Boston, Mass (D.J.C., C.A.S., K.K.L.H., D.S.B.); the Department of Health Policy and Management, Harvard School of Public Health, Boston, Mass (D.J.C., R.B.S.); Yale School of Medicine, New Haven, Conn (H.M.K., M.C.); Arizona Heart Institute, Phoenix (R.R.H.); Johns Hopkins Hospital, Baltimore, Md (J.A.B.); Lenox Hill Hospital, New York, NY (J.W.M.); Jefferson Medical College, Philadelphia, Pa (M.P.S.); the University of Pittsburgh (Pa) (K.D.);...