Expression of Concern to: World J Surg Oncol

https://doi.org/10.1186/s12957-016-0784-x

The Editor-in-Chief is issuing an editorial expression of concern to alert readers that this article [1] contains substantial overlap with articles published within a close time frame [2,3,4,5]. None of the authors have responded to any correspondence from the editor or publisher about this editorial expression of concern.