Nat. Immunol. 14, 143–151; published online 22 December 2013; corrected after print 29 January 2014

In the version of this article initially published, the far right labels in Figure 2d,e were truncated. The correct label for each is 'RorcGFP/GFP'. Also, a sentence was missing from the Flow Cytometry subsection of the Online Methods section. That subsection should begin as follows: “Neutrophils were incubated for 2 h at 37oC and 5% CO2 with a brefeldin–monensin 'cocktail' (Protein Transport Inhibitor Cocktail; eBioscience) during in vitro stimulation. Total bone marrow cells....” The errors have been corrected for the HTML and PDF versions of this article.