Tarigan, E. et al. 2013. S-Index and APRI Score to Predict Liver Fibrosis Chronic in Hepatitis B and C Patients. The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy. 14, 2 (Sept. 2013), 64–68. DOI:https://doi.org/10.24871/142201364-68.