Retraction to: Oncogene https://doi.org/10.1038/onc.2008.319, published online 08 September 2008

The Editors-in-Chief have retracted this article. Concerns were raised regarding figure 5, specifically that blots have been reused between papers in different experimental contexts [1]. The authors have been unable to retrieve the original data but have repeated some of the experiments described in this article. The authors have been offered to resubmit a revised manuscript for reconsideration.

Authors E S Knudsen and A K McClendon agree to this retraction. Author W A Braden did not respond to any correspondence from the editor or the publisher about this retraction.