1. Department of General and Emergency Surgery, Garibaldi-Nesima Hospital, Catania, Italy
2. Department of General Surgery, San Salvatore Hospital, Paternò, Italy
3. Department of General Surgery, Santa Marta e Santa Venera Hospital, Acireale, Italy
4. Department of Medical Surgical Sciences and Advanced Technologies “GF Ingrassia” – Radiology Unit I, University Hospital “Policlinico-San Marco”, Catania, Italy
5. Department of Medical Surgical Sciences and Advanced Technologies “GF Ingrassia” – Radiology Unit I, Valerio, Catania, Italy