Regmi, U. K., & Sapkota, S. (2017). Efficacy of tramadol as an adjuvant to bupivacaine for caudal analgesia in children: a randomised controlled trial. Journal of Society of Anesthesiologists of Nepal, 4(1), 11-15. Retrieved from http://www.jsan.org.np/jsan/index.php/jsan/article/view/136