Abstract
Following the publication of this paper, it was drawn to the Editors' attention by a concerned reader that certain of the cell Transwell assay data in the article (featured in Figs. 3B and 6B) were strikingly similar to data that appearing in different form in another article by different authors at different research institutions, which had already been published elsewhere at the time of the present article's submission. Owing to the fact that the contentious data in the above article had already appeared in different form in another article prior to its submission to Oncology Reports, the Editor has decided that this paper should be retracted from the Journal. The authors did not reply to indicate whether or not they agreed with the retraction of the paper. The Editor apologizes to the readership for any inconvenience caused. [the original article was published on Oncology Reports 34: 399‑406, 2015; DOI: 10.3892/or.2015.3986].