[1] Geneva Univ Hosp, Intens Care Serv, Geneva, Switzerland
[2] Univ Geneva, Fac Med, Geneva, Switzerland
[3] Geneva Haemodynam Res Grp, Geneva, Switzerland
[4] Univ Milan, Grp Osped San Donato, Milan, Italy
[5] Ist Clin St Ambrogio, Chair Cardiac Surg, Dept Cardiothorac Surg, Milan, Italy