[1] Univ Perugia, Fac Med, Dept Cardiol, I-06100 Perugia, Italy
[2] Attikon Univ Hosp, Athens, Greece
[3] Hosp Lariboisiere, AP HP, Dept Anesthesiol & Crit Care Med, Paris, France
[4] Univ Hosp 12 Octubre, Dept Cardiol, Madrid, Spain
[5] Univ Zurich Hosp, Div Cardiol, CH-8091 Zurich, Switzerland