[1] Univ Med Ctr Utrecht, Utrecht, Netherlands
[2] Inst Mutualiste Montsouris, Paris, France
[3] Leipzig Heart Ctr, Leipzig, Germany
[4] Ctr Hosp Univ Dijon, Dijion, France
[5] Johns Hopkins Univ Hosp, Baltimore, MD 21287 USA
[6] European Hosp, Rome, Italy
[7] Hop Foch, Suresnes, France
[8] Clin Univ St Luc, B-1200 Brussels, Belgium
[9] Montreal Heart Inst, Montreal, PQ H1T 1C8, Canada
[10] Med Spectrum Twente, Enschede, Netherlands
[11] People Hosp, Urumqi, Peoples R China
[12] Erasme Univ Hosp, B-1070 Brussels, Belgium
[13] Kobe Univ, Kobe, Hyogo 657, Japan
[14] Hosp Univ Virgen Victoria, Malaga, Spain
[15] Univ Saarland, Med Ctr, Homburg, Germany
[16] Mayo Clin, Rochester, MN USA
[17] Hannover Med Sch, Hannover, Germany
[18] Erasmus Univ, Sch Med, Rotterdam, Netherlands
[19] Univ Hosp Hradec Kralove, Hradec Kralove, Czech Republic