Correction to: Cell Research (2007) 17:1030–1040. doi: 10.1038/cr.2007.100; published online 4 December 2007

In the print version of this article, there is an error in the internal page number which located in the first page of this article. “Cell Research (2007) 17:1030–11040.” should be “Cell Research (2007) 17:1030–1040.”.