Pathanon, Panatda, Natrada Jangprajak, Sirakarn Chansing, Apiradee Jaidee, and Sopit Tubtimhin. “Efficacy of Sedation for Colonoscopy, A Comparison Between Propofol and Ketamine Combination (Ketofol) Versus Propofol and Fentanyl Combination (Fenofol)”. Journal of The Department of Medical Services 46, no. 1 (June 18, 2021): 37–44. Accessed May 6, 2024. https://he02.tci-thaijo.org/index.php/JDMS/article/view/254590.