Sanansilp, Vimolluck, Varit Rasmidatta, Peerapatr Tangkitngamwong, and Santi Pongphantarak. “Comparison of Intravenous Vs. Intramuscular Morphine for Postoperative Pain Relief on the Multidisciplinary Care Path Implemented Ward”. Siriraj Medical Journal 58, no. 12 (December 1, 2006): 1216–1221. Accessed May 3, 2024. https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/246012.