General Surgery Unit, Department of Advanced Medical and Surgical Sciences, University of Campania "Luigi Vanvitelli", Piazza Miraglia, 80138, Naples, Italy. Maxillofacial Surgery Unit, Federico II University, Naples, Italy. Division of Morphopathology, Department of Advanced Medical and Surgical Sciences, University of Campania "Luigi Vanvitelli", Naples, Italy. General Surgery Unit, Department of Advanced Medical and Surgical Sciences, University of Campania "Luigi Vanvitelli", Piazza Miraglia, 80138, Naples, Italy. massimo.defalco@unicampania.it.