Thanawut, S., Y. . Sirivatanauksorn, and C. . Limwongs. “Factor V Leiden and Prothrombin Gene Mutation in Deep Vein Thrombosis”. The Thai Journal of Surgery, vol. 27, no. 1, Mar. 2006, pp. 11-14, https://he02.tci-thaijo.org/index.php/ThaiJSurg/article/view/242045.