1. Gastroenterology Unit Department of Clinical Medicine and Surgery University of Naples “Federico II” Naples Italy
2. Department of Transplantation Cardarelli Hospital Naples Italy
3. Department of Public Health University of Naples “Federico II” Naples Italy
4. Department of Advanced Medical and Surgical Sciences University of Campania "Luigi Vanvitelli" Naples Italy
5. Department of Medicine and Surgery University of Salerno Salerno Italy
6. Infectious Diseases AORN San Pio, P.O. Gaetano Rummo Benevento Italy
7. Department of Mental Health and Public Medicine Section of Infectious Diseases University of Campania "Luigi Vanvitelli" Naples Italy