Editorial Expression of Concern to: Cancer Gene Therapy https://doi.org/10.1038/sj.cgt.7700739, published online 27 August 2004

The Editor-in-Chief is issuing this Editorial Expression of Concern to alert readers that concerns have been raised about some of the data reported in this article. Specifically, in Fig. 2a the panels for WT Ad and Adhz60 appear to overlap. The Publisher contacted the authors to discuss these concerns, but due to the age of this paper, the authors were no longer able to access the raw image files. Readers are advised to interpret the data reported in this article with caution.

Heshan Sam Zhou did not explicitly state whether they agree or disagree with this Editorial Expression of Concern. Malcolm K Brenner stated that he has no comment to make on the publication of this Editorial Expression of Concern. Michael T Tseng is deceased. The remaining authors did not respond to correspondence from the Publisher regarding this Editorial Expression of Concern.