Metropolitan Hospital; Hematology Dept, Athens, Greece
University Hospital of Larissa; Hematology Dept., Larissa, Greece
Laiko General Hospital of Athens; A Propedeutical Clinic of Internal Medicine, Athens, Greece
Kirov Region Aids-Center; Infectious, Kirov, Russian Federation
Infections Deseases Hospital #1, Novosibirsk, Russian Federation
Krasnoyarsk Region Aids Center; Hepatology, Krasnoyarsk, Russian Federation
Tel-Aviv Sourasky Medical Center; Liver Unit, Tel Aviv, Israel
Haemek Hospital; Gastroenterology, Afula, Israel
Barzilai MC; Gastroenterology, Ashkelon, Israel