El-Zefzafy, W., H. Eltokhy, N. A. El-Ghaffar Mohamed, and Z. Abu-Zahab. “Significance of Serum Cytokeratin-18 in Prediction of Hepatocellular Carcinoma in Chronic Hepatitis C Infected Egyptian Patients”. Open Access Macedonian Journal of Medical Sciences, vol. 3, no. 1, Feb. 2015, pp. 117-23, doi:10.3889/oamjms.2015.021.