Enrico Facchiano1, Marcello Lucchese2. 1. Department of Surgery, Bariatric and Metabolic Surgery Unit, Santa Maria Nuova Hospital, Piazza Santa Maria Nuova, 50122, Florence, Italy. enricofacchiano@yahoo.it. 2. Department of Surgery, Bariatric and Metabolic Surgery Unit, Santa Maria Nuova Hospital, Piazza Santa Maria Nuova, 50122, Florence, Italy.