Evaluation of the outcome of interferon therapy in chronic hepatitis B infection - ÇAYLAN, Rahmet; AYDIN, Kemalettin; KÖKSAL, İftihar; ÖKSÜZ, Recep; KOSTAKOĞLU, Uğur; ÇOBANOĞLU, Ümit; ARI, Nurucihan; AYDIN, Sevim (Turkish Journal of Gastroenterology, 1999)