Correction to: Cell Death and Disease (2013) 4, e634; doi:10.1038/cddis.2013.153; published online 16 May 2013

Since the publication of this article, the authors wish to indicate that Xiaoli Yu, Yan Zhen, Huiling Yang and Hao Wang equally contributed to this article. The corrected authors list is shown above. The article with the correct authors list appears online together with this corrigendum.

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