Kham-im, K., Choojai, M., & Luangareeporn, S. (2018). Efficacy of Systemic Single-dose Diclofenac, Tramadol, and Placebo Immediately after Caesarean Section under Intrathecal Morphine. Journal of Health Science of Thailand, 17(Sup.2), SII360–368. Retrieved from https://thaidj.org/index.php/JHS/article/view/2721