Correction to: Nature Communications https://doi.org/10.1038/ncomms6870, published online 18 December 2014.

The original version of this Article contained an error in Fig. 4, panel a. The representative image for the 12 hour time point in the KL group (second from the right, middle raw) was inadvertently replaced with an inverted duplicate of the image for the 24  hour time point in the same group (the last image on the right, middle raw). The correct version of Fig. 4a is:

It replaces the previous incorrect version, which is:

This error is not corrected in the PDF nor HTML versions of the Article. The original conclusions are not affected by this change.