Emergency Surgery Unit, Department of General and Transplant Surgery, S.Orsola Malpighi University Hospital, Bologna, Italy;
Upper GI Surgery Unit, Department of Surgery, Frenchay Hospital, North Bristol NHS Trust, Bristol BS16 1LE, UK;
Emergency and Trauma Surgery Unit, Maggiore Hospital Trauma Center Bologna, Italy;
Emergency Surgery Unit, Department of General and Transplant Surgery, S.Orsola Malpighi University Hospital, Bologna, Italy;
Upper GI Surgery Unit, Department of Surgery, Frenchay Hospital, North Bristol NHS Trust, Bristol BS16 1LE, UK;
Emergency and Trauma Surgery Unit, Maggiore Hospital Trauma Center Bologna, Italy;
Emergency Surgery Unit, Department of General and Transplant Surgery, S.Orsola Malpighi University Hospital, Bologna, Italy;
General Surgery I Dept., Ospedali Riuniti Bergamo, Italy;