Predictive value of proliferating cell nuclear antigen index in response to interferon treatment in patients with chronic viral hepatitis B and C - KARASU, Zeki; YILMAZ, Funda; ERSÖZ, Galip; GÜNŞAR, Fulya; BATUR, Yücel; AKARCA, Ulus Salih (Turkish Journal of Gastroenterology, 2001)