1 Section of Anesthesia and Intensive Care, Department of Surgery, G.B. Morgagni-Pierantoni Hospital, Forlì, Forlì-Cesena, Italy - drpiraccini@gmail.com.
2 Section of Anesthesia and Intensive Care, Department of Surgery, G.B. Morgagni-Pierantoni Hospital, Forlì, Forlì-Cesena, Italy.