Prathana W, Nattapong L, Duenpen H, Trisana S, Veerasak T, Ornanong S, Tunchanok P, Tanaporn H. “Epidural Analgesia Versus Intravenous Fentanyl Infusion in Children With Cerebral Palsy Undergo Major Orthopedic Surgery: Randomized Controlled Trial”. Journal of The Department of Medical Services, vol. 45, no. 3, Jan. 2021, pp. 67-75, https://he02.tci-thaijo.org/index.php/JDMS/article/view/248597.