Thapananon, Thanacom, and Rangsima Thiengthiantham. 2022. “Efficacy and Adverse Effects of Sodium Phosphate and Polyethylene Glycol When Used in Bowel Preparation Prior to Colonoscopy Among Patients Admitted at Vajira Hospital”. Vajira Medical Journal : Journal of Urban Medicine 66 (2):115-24. https://doi.org/10.14456/vmj.2022.12.