Editorial Expression of Concern to: Oncogene https://doi.org/10.1038/s41388-018-0347-4, published online 31 May 2018

The Editors-in-Chief are issuing this editorial expression of concern to alert readers that overlap has been noted in Figure 1i between the shPD-L1 and the Con images and also in Figure 1f between the CaSki Con and PD-L1 image.

Peixin Dong agrees with this Editorial Express of Concern. Junming Yue did not explicitly state whether or not they agree with this Editorial Express of Concern. Ying Xiong, Tang Tao, Song Yi, Hidemichi Watari and Noriaki Sakuragi did not respond to correspondence from the Publisher about this Editorial Express of Concern. The editor was not able to obtain current email addresses for Jiehai Yu, Lin Chen and Sharon J. B. Hanley.