1. Unit of Gastrointestinal Surgery, Department of Surgery, University of Campania “Luigi Vanvitelli”,Via Pansini 5, bld 17, ZIP 80100, Naples, Italy
2. Unit of Endoscopic Surgery, Department of Surgery, University of Campania “Luigi Vanvitelli”, Naples, Italy
3. Unit of General, Mininvasive and Bariatric Surgery, Department of Surgery, University of Campania “Luigi Vanvitelli”, Naples, Italy