1 Department of Cardiothoracic and Vascular Anesthesia and Intensive Care, AO SS Antonio e Biagio e Cesare Arrigo, Alessandria, Italy; Kore University, Enna, Italy and Centro Cuore GB Morgagni, Catania, Italy.
2 Department of Cardiothoracic and Vascular Anesthesia and Intensive Care, AO SS Antonio e Biagio e Cesare Arrigo, Alessandria, Italy.
3 Division of Cardiothoracic Intensive Care, Cardiothoracic Department, ASST Spedali Civili, Brescia, Italy.
4 Division of Cardiothoracic Intensive Care, Cardiothoracic Department, ASST Spedali Civili, Brescia, Italy. Electronic address: montisci.andrea@yahoo.it.