1. Division of Gastroenterology Casa Sollievo Sofferenza Hospital Istituto di Ricovero e Cura a Carattere Scientifico San Giovanni Rotondo Italy
2. Clinics of Infectious Diseases University of Bari Bari Italy
3. Centre for the Study of Hepatitis Department of Medical and Surgical Sciences University of Bologna Bologna Italy
4. Infectious and Tropical Diseases Unit S. Anna and S. Sebastiano Hospital Caserta Italy
5. Division of Gastroenterology Department of Clinical Medicine and Surgery Federico II University of Napoli Naples Italy
6. Section of Gastroenterology Department of Emergency and Organ Transplantation Azienda Ospedaliero Universitaria Policlinico University of Bari Bari Italy
7. Liver Unit Hospital of Castellaneta Castellaneta Italy
8. Clinics of Infectious Diseases Federico II University of Napoli Naples Italy