1 General Surgery, Augusta Hospital, Siracusa, Italy.
2 Department of Surgical Sciences and Advanced Technologies "G. F. Ingrassia, " University of Catania, Cannizzaro Hospital, General Surgery, Via Messina 829, 95126, Catania, Italy.
3 Department of Surgical Sciences and Advanced Technologies "G. F. Ingrassia, " University of Catania, Cannizzaro Hospital, General Surgery, Via Messina 829, 95126, Catania, Italy. idicarlo@unict.it.