Following the publication of this paper, it was drawn to the Editor's attention by a concerned reader that certain of the BrdU incorporation assay data shown in Fig. 7C were strikingly similar to data that had already appeared in another article written by different authors at different research institutes [Lu M, Qin X, Zhou Y, Li G, Liu Z, Geng X and Yue H: Long non‐coding RNA LINC00665 promotes gemcitabine resistance of Cholangiocarcinoma cells via regulating EMT and stemness properties through miR‐424‐5p/BCL9L axis. This evidence concerns the gene BCL9L and cholangiocarcinoma.