[1] Univ Paris 06, Pitie Salpetriere Hosp, Div Cardiac Surg, F-75013 Paris, France
[2] Univ Naples 2, Cardiovasc Surg Unit, PhD Sch Cardiothorac & Resp Sci, Naples, Italy
[3] Univ Verona, Sch Med, Cardiovasc Surg Unit, PhD Sch Cardiovasc Sci, I-37100 Verona, Italy
[4] Univ Paris 06, Pitie Salpetriere Hosp, Dept Anaesthesiol, F-75013 Paris, France