Moolasarn, Summana. “Mortality Risks of Appendicitis Patients Who Had Different Levels of Health Insurance Coverage Status”. Siriraj Medical Journal 55, no. 9 (September 1, 2003): 545–552. Accessed May 19, 2024. https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/245448.