Lertsithichai, P. ., and R. . Youngpairoj. “Prophylaxis of Esophageal Variceal Bleeding: A Cost-Utility Analysis Comparing Five Strategies”. The Thai Journal of Surgery, vol. 27, no. 1, Mar. 2007, pp. 30-41, https://he02.tci-thaijo.org/index.php/ThaiJSurg/article/view/242049.