Editorial Expression of Concern to: Oncogene https://doi.org/10.1038/onc.2012.212, published online 11 June 2012 The Editors-in-Chief would like to alert readers that concerns were raised about the authenticity of Figure 4a. Specifically, the Vinculin bands in the Mock and GRP78 panels appear to be similar; there are signs of undeclared splicing in these same panels. The authors provided some source data up on request from the Publisher, but this was insufficient to address the concerns raised.