Following the publication of the above review article, the authors have realized that they overlooked including the funding information in the Declarations section. Therefore, the following text should also have been included with the review: Funding: The present review was supported by the National Research Foundation of Korea grant funded by the Korean government (grant no. 2020R1F1A1061122) and Gachon University Research fund of 2018 (GCU-2018-0670) to SH. The authors regret their oversight, apologize to the funding bodies concerned, and regret any inconvenience caused. [the original article was published in International Journal of Oncology 58: 344‑358, 2021; DOI: 10.3892/ijo.2021.5175].
Keywords: non-coding RNA; predictive biomarker; radioresistance; radiotherapy; rectal cancer.