Retraction to: Spinal Cord advance online publication, 6 April 2010; doi:10.1038/sc.2010.35

The authors of the above article would like to retract it.

All the authors of the above article would like to retract this paper. The paper contains inaccuracies in four figures (Figures 2b and c, and 5a and b), which, although similar to the original images and containing the same message, are not the original pictures referring to the experiments performed. The authors apologize to the readers, reviewers and editors of Spinal Cord for publishing these erroneous images.