After the publication of the article, the authors realized that they had inadvertently included the incorrect data for the 'siDOR+5‑fu group' in the flow cytometric plots featured in Fig. 3A. A new version of Fig. 3 is provided, which contains the correct data for the 'siDOR+5‑fu group' experiment. The authors regret this error, and apologize to the readers for any inconvenience caused. [the original article was published in the Molecular Medicine Reports 13: 59‑66, 2016; DOI: 10.3892/mmr.2015.4511].