1. Department of General Surgery and Liver Transplantation, San Camillo Forlanini Hospital, Rome, Italy
2. Department of Digestive and Liver Diseases, University Sapienza, Rome, Italy
3. Statistics Section, Department of Public Health and Infectious Diseases, University Sapienza, Rome, Italy
4. Department of Radiology, San Camillo Forlanini Hospital, Rome, Italy
5. Department of General Surgery, San Camillo Forlanini Hospital, Rome, Italy
6. Department of Anesthesiology and Intensive Care, San Camillo Forlanini Hospital, Rome, Italy