1 General Surgery and Transplant Unit, Department of Medical and Surgical Sciences, Sant'Orsola-Malpighi Hospital, University of Bologna, Via Massarenti 9, 40138, Bologna, Italy. matteo.ravaioli@aosp.bo.it.
2 General Surgery and Transplant Unit, Department of Medical and Surgical Sciences, Sant'Orsola-Malpighi Hospital, University of Bologna, Via Massarenti 9, 40138, Bologna, Italy.