Correction to: Cell Death and Disease (2013) 4, e500; doi:10.1038/cddis.2013.32; published online 21 February 2013

Since the publication of this article the authors have noticed that the Authors Contribution section was omitted.

The error has now been rectified. The article with the Authors Contribution appears online together with this corrigendum.

The authors would like to apologize for any inconvenience this may have caused.