1. Gastroenterology Department; Athens University Medical School; Laikon General Hospital of Athens; Athens Attica Greece
2. 2nd Department of Internal Medicine; Athens University Medical School; Hippokration General Hospital of Athens; Athens Attica Greece
3. Department of Hygiene; Epidemiology & Medical Statistics; Athens University Medical School; Athens Attica Greece
4. Viral Hepatitis Committee; KEELPNO; Athens Attica Greece
5. 2nd Medical Department; Aristotle University of Thessaloniki; Thessaloniki Greece
6. Department of Internal Medicine; University of Patras; Rio Achaia Greece
7. 2nd Gastroenterology Department; Evangelismos General Hospital of Athens; Athens Attiki Greece
8. 4th Department of Internal Medicine; Athens University Medical School; Athens Attica Greece
9. Gastroenterology Department; Papanikolaou General Hospital of Thessaloniki; Thessaloniki Greece
10. 2nd Department of Internal Medicine; General Hospital of Piraeus; Athens Greece
11. 1st Department of Internal Medicine; Democritus University of Thrace; Avdira Greece
12. Department of Internal Medicine; Hippokration General Hospital of Athens; Athens Greece
13. Division of Internal Medicine; Athens University Medical School; Athens Attica Greece
14. Gastroenterology Department; Polykliniki Hospital of Athens; Athens Greece
15. Department of Pathophysiology; Athens University Medical School; Athens Attica Greece
16. Department of Medicine & Research Laboratory of Internal Medicine; Thessaly University Medical School; Larissa Greece