1. Internal Medicine and Hepatology, University Campus Bio-Medico of Rome, Rome, Italy;
2. Medical Team Torino, Torino, Italy;
3. ASL Pescara, Pescara, Italy;
4. Department of Gastroenterology, University Hospital, Pisa, Italy;
5. Liver Unit, San Camillo Hospital, Roma, Italy;
6. Liver Unit, University Hospital of Cagliari, Cagliari, Italy;
7. ASL RM A, Rome, Italy;
8. Gastroenterology Unit, Santa Maria Delle Croci Hospital, Ravenna, Italy;
9. Department of Gastroenterology, Brotzu Hospital, Cagliari, Italy;
10. Liver Unit, Arnas Garibaldi, Catania, Italy;
11. Gastroenterology Unit, National Institute of Gastroenterology “S de Bellis” Reseach Hospital, Castellana Grotte (Bari), Italy;
12. General Medicine and Medical Pathology, Sassari University Hospital, Sassari, Italy;
13. Department of Gastroenterology, Casa Sollievo Della Sofferenza Institute, San Giovanni Rotondo (Foggia), Italy;
14. Internal Medicine Unit, Casarano Hospital, Lecce, Italy;
15. Department of Hepatology, University Hospital Policlinico Vittorio Emanuele, Catania, Italy;
16. Department of Hepatology, Betania Hospital, Napoli, Italy;
17. Department of Hepatology, Fatebenefratelli Hospital, Napoli, Italy;
18. Department of General Medicine, Umberto I Hospital ASL Salerno, Nocera Inferiore, Italy;
19. Department of Internal Medicine, Luigi Vanvitelli University of Campania, Napoli, Italy;
20. Department of Infectious Diseases, Umberto I Hospital, Siracusa, Italy;
21. Department of Infectious Diseases, D. Cotugno Hospital, Napoli, Italy