1. From Thoraxcenter, Rotterdam, the Netherlands (E.R., P.W.S., M.D., K.T.); Medizinische Universitätsklinik, Freiburg, Germany (C.B., C.H.); Hôpital Broussais, Paris, France (J.L.G.); Onze Lieve Vrouw Klinik, Aalst, Belgium (W.W.); Centro Cardiologico, Milano, Italy (A.B.); Clinico Cardiologico, Curitibana, Parana, Brasil (C.C.); Cardialysis BV, Rotterdam, the Netherlands (C.D.); Cordis Corporation, Waterloo, Belgium (E.W.); and L’Institut Cardiovasculaire Paris-Sud, Massy, France (M.C.M.).