1. Department of Medical Area, University of Udine, Santa Maria della Misericordia University Hospital Udine, I‑33100 Udine, Italy
2. Department of Obstetrics and Gynaecology, Monfalcone Hospital, I‑34074 Monfalcone, Italy
3. Department of Pathology, Santa Maria della Misericordia University Hospital Udine, I‑33100 Udine, Italy
4. Department of Gastroenterology, Santa Maria della Misericordia University Hospital Udine, I‑33100 Udine, Italy
5. Department of Surgery, Santa Maria della Misericordia University Hospital Udine, I‑33100 Udine, Italy
6. Department of Surgery, Tolmezzo Hospital, I‑33028 Tolmezzo, Italy
7. Department of Surgery, San Daniele Hospital, I‑33038 San Daniele, Italy
8. Department of Upper Gastrointestinal Surgery, The Civil Hospital of Verona University, I‑37126 Verona, Italy