Retraction to: Leukemia; doi:10.1038/leu.2009.207

The authors of the above article would like to retract it. The paper contains inaccuracies in three figures (Figures 2a, 5 and 7b), which, although similar to the original images and containing the same message, are not the original pictures referring to the experiments done.

The authors apologize to the readers, reviewers and editors of Leukemia for publishing these erroneous images.