Nat. Immunol.; doi:10.1038/ni.3447; corrected online 29 April 2016

In the version of this article initially published online, the interferon (IFN-α) in the fourth sentence of the abstract is incorrect. That section should read “the locus encoding interferon-γ (IFN-γ)....” Also, sentence two in paragraph three of the introduction includes a typographical error (“zand”); that should read “IL-18 and IL-1....” The errors have been corrected for the print, PDF and HTML versions of this article.