[1] AO SS Antonio & Biagio & Cesare Arrigo, Dept Cardiothorac & Vasc Anesthesia & Intens Care, Via Venezia 16, I-15121 Alessandria, Italy
[2] AO SS Antonio & Biagio & Cesare Arrigo, Dept Cardiac Surg, Via Venezia 16, I-15121 Alessandria, Italy
[3] AO SS Antonio & Biagio & Cesare Arrigo, Dept Cardiol, Via Venezia 16, I-15121 Alessandria, Italy