Sanansilp, Vimolluck. “Pain Control System in Siriraj Hospital Postanesthesia Care Unit (PACU)”. Siriraj Medical Journal 66, no. 4 (July 1, 2014). Accessed May 2, 2024. https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/55264.