1. From Centre Hospitalier Universitaire Bichat-Beaujon, Assistance Publique-Hôpitaux de Paris, France (P.G.S., L.J.F., A.C.-S., M.-C.A.); the University of Massachusetts Medical School, Worcester, Mass (O.H.D., R.J.G., F.A.A.); Hospital Universitario Gregorio Marañon, Madrid, Spain (J.L.-S.); Grochowski Hospital, Warsaw, Poland (A.B.); and Medizinische Universitätsklinik, Klinische Abteilung fur Kardiologie, Graz, Austria (W.K.).