Sangchan, Prangrawee. “Outcomes of preoperative radiotherapy in rectal cancer: a single institute experience”. Journal of Thai Association of Radiation Oncology 27, no. 1 (June 18, 2021): R67-R80. accessed September 28, 2026. https://he01.tci-thaijo.org/index.php/jtaro/article/view/248852.