[1] VA San Diego Healthcare Syst, San Diego, CA USA
[2] Univ Basel Hosp, Basel, Switzerland
[3] Univ N Carolina, Chapel Hill, NC USA
[4] Campus Virchow Klinikum, Charite, Berlin, Germany
[5] San Spirito Hosp, Rome, Italy
[6] Univ Hull, Castle Hill Hosp, Kingston Upon Hull, Yorks, England
[7] Hop Lariboisiere, F-75475 Paris, France
[8] Linkoping Univ Hosp, S-58185 Linkoping, Sweden
[9] Univ Calif San Diego, San Diego, CA 92103 USA
[10] Univ Roma La Sapienza, St Andreas Hosp, Rome, Italy
[11] Univ Athens, Hosp Attikon, Athens, Greece
[12] Univ Calif Los Angeles, Los Angeles, CA USA
[13] Paris Descartes Univ, Paris, France
[14] Univ Paris 06, Pitie Salpetriere Hosp, Dept Cardiol, Paris, France
[15] Univ Toronto, Toronto, ON, Canada
[16] Royal Brompton Hosp, London SW3 6LY, England
[17] St Vincents Univ Hosp, Dublin 4, Ireland
[18] Univ Paris 07, Hop Lariboisiere, Paris, France
[19] Univ Helsinki, Cent Hosp, Helsinki, Finland
[20] Cleveland Clin, Cleveland, OH 44106 USA
[21] San Filippo Neri Hosp, Rome, Italy
[22] Osped Civile, Ctr Scompenso, San Dona Di Piave, Italy
[23] Onze Lieve Vrouwe Ziekenhuis, Aalst, Belgium
[24] Baylor Univ, Med Ctr, Dallas, TX USA
[25] Ctr Invest Clin, INSERM, Nancy, France
[26] Brigham & Womens Hosp, Boston, MA 02115 USA