Kowcachaporn, P., P. Toowicharanon, and C. Limwongse. “Review of Non-Surgical Procedures in Medical Wards : From Utilization Review Results to Process Improvement”. Siriraj Medical Journal, vol. 56, no. 9, Sept. 2004, pp. 493-05, https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/245564.