Following the publication of this paper, it was drawn to the Editors' attention by a concerned reader that various panels showing the cellular data in Fig. 1B, the western blotting data shown in Figs. 2B and 3C, the TEM scanning data shown in Fig. 4B, the ChIP assay data in Fig. 2F and the flow cytometric assay data in Fig. 3D were strikingly similar to data appearing in different form in other articles by different authors from different research institutions. Owing to the fact that the contentious data in the above article had already been published, or were already under consideration for publication elsewhere, prior to its submission to International Journal of Oncology, the Editor has decided that this paper should be retracted from the Journal. The authors independently contacted the Editorial Office to request the retraction of this paper. The Editor apologizes to the readership for any inconvenience caused. [International Journal of Oncology 53: 527‑538, 2018; DOI: 10.3892/ijo.2018.4412].
Keywords: erlotinib; exosome; forkhead box protein O1; long non-coding RNA RP11‑838N2.4; non-small cell lung cancer.