1 Section of Anesthesia, Intensive Care and Pain Medicine, Città di Castello Hospital, Città di Castello, Perugia, Italy.
2 Section of Anesthesia and Intensive Care, AUSL Romagna, M. Bufalini Hospital, Cesena, Forlì-Cesena, Italy - domenicopietro.santonastaso@auslromagna.it.
3 Breast Unit, Department of Surgery, Città di Castello Hospital, Città di Castello, Perugia, Italy.
4 Section of Anesthesia and Intensive Care and Pain Medicine, San Salvatore Hospital, L'Aquila, Italy.
5 Section of Anesthesia, Department of Surgical and Biomedical Sciences, Analgesia and Intensive Care, University of Perugia, Perugia, Italy.