1. Department of Surgery, Taormina Hospital, 98034 Messina, Italy
2. Hepatology Unit, Department of Medical and Pediatric Science, University of Catania, 95100 Catania, Italy
3. Department of Surgical Sciences, Organ Transplantation and Advanced Technologies, University of Catania, Cannizzaro Hospital, Via Messina 829, 95100 Catania, Italy
4. Department of Surgery, Cannizzaro Hospital, 95126 Catania, Italy
5. Department of Surgery, Hamad General Hospital, P.O. Box 3050 Doha, Qatar
6. Endocrine Surgical Unit, “Policlinico e Vittorio Emanuele” Hospital, University of Catania, 95100 Catania, Italy
7. General Surgery and Senology Unit, Department of Surgery, “Policlinico e Vittorio Emanuele” Hospital, University of Catania Medical School, 95100 Catania, Italy
8. Radiology Unit, Guzzardi Hospital, 97019 Vittoria, Italy