1. Department of General Surgery, Istituto Clinico Sant'Ambrogio, Milan, Italy
2. Department of Pathology and Cytodiagnostic, IRCCS Policlinico San Donato, Milan, Italy
3. General Surgery Residency Program, University of Milan, Milan, Italy
4. Department of General Surgery, Santa Maria degli Angeli Hospital, Pordenone, Italy
5. Department of Pediatric Surgery, Fondazione IRCCS Ca’ Granda – Maggiore Policlinico Hospital, Milan, Italy
6. Department of General Surgery, San Raffaele Hospital, Milan, Italy