A comparative immunohistochemical study of HBsAg, HBcAg and CD57 in chronic hepatitis B pediatric patients with and without malignant disorders - DİNİZ, Gülden and AKTAŞ, Safiye and ORTAÇ, Ragıp and ÜNLÜ, İsmet and VERGİN, Canan (Turkish Journal of Gastroenterology, 2003)