1. From the University of Michigan, Ann Arbor (A.M.R., A.M.B., D.M.W., E.A.K., J.B.F., D.G.M., J.V.C., K.A.E.); Mt Sinai Hospital, New York, NY (L.K.H.); University Hospital Rostock, Rostock, Germany (C.A.N.); Brigham and Women's Hospital, Boston, MA (P.T.O.'G.); Minneapolis Heart Institute, Minneapolis, MN (K.M.H.); University of Calgary, Calgary, Alberta, Canada (S.H.); Hospital General Univri Vall d'Hebron, Barcelona, Spain (A.E.); and Massachusetts General Hospital, Boston (E.M.I.).