Stefano Cristiano1, Domenico Ivan Fico1, Salvatore Tolone2. 1. Bariatric Surgery Unit, "Trusso" Clinic, Ottaviano, Italy. 2. Division of General and Bariatric Surgery, Department of Surgery, University of Campania "Luigi Vanvitelli", Via Pansini 17, 80131, Naples, Italy. salvatore.tolone@unicampania.it.