Nat. Immunol. doi:10.1038/ni.2967 corrected online 8 September 2014

In the version of this article initially published online, the vertical axis of the bottom right graph in Figure 3h was incorrect. It should read “F4/80loCD11b+ cells (×105).” Also, in the Online Methods, the first sentence of the third subsection (“Generation of bone marrow chimeras”) identifies the donor mice incorrectly. It should read “...BM cells from CD45.2+ wild-type mice and CD45.1+ Ccr2−/− mice....” The errors have been corrected for the print, PDF and HTML versions of this article.