1 Unit of Anesthesia and Intensive Care, Azienda Romagna, M. Bufalini Hospital, Cesena, Forlì-Cesena, Italy - domenicopietro.santonastaso@auslromagna.it.
2 Unit of Anesthesia and Intensive Care, Azienda Romagna, M. Bufalini Hospital, Cesena, Forlì-Cesena, Italy.