Rattanalao, Ajalaya. 2022. “Comparison of Ondansetron and Ondansetron With Propofol to Prevent Intrathecal Morphine-Induced Pruritus in Patients Undergoing Cesarean Section”. Journal of The Department of Medical Services 47 (2):102-8. https://he02.tci-thaijo.org/index.php/JDMS/article/view/253977.