Editorial Expression of Concern: Loss of Smad4 promotes aggressive lung cancer metastasis by de-repression of PAK3 via miRNA regulation

The Editors would like to alert the readers that concerns have been raised regarding similarities between different images in this article.Specifically, the 0 h, SPK-1 assay in Figure 2c appears to overlap with the 0 h, SPK Antagonist miR-543 assay in Figure 2 g; the p-JNK and p-Jun panels in the top row of Figure 6 h appear to overlap partially.