Harahap, Arnold Hasahatan, Dadang Makmun, and Irsan Hasan. 2010. “Factors Found on the First Variceal-Bleeding Episode in Liver Cirrhosis Patients With Portal Hypertension”. The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy 11 (1):15-18. https://doi.org/10.24871/111201015-18.