Suraseranivongse, S., Valairucha, S. ., Laohapensang, M. ., Ruangtrakul, . R. ., Saleepanth, S. ., Kaosaard, R. ., & Sirirutbunkajal, P. . (2003). Comparison of Morphine Given by An Intravenous Sliding Scale or by Intramuscular Route for Postoperative Pain Relief in Pediatric Patients : An Interim Analysis. Siriraj Medical Journal, 55(8), 465–472. Retrieved from https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/245437