Correction to: Nature Immunology 18, 800–812 (2017); https://doi.org/10.1038/ni.3748; published online 15 May 2017.
In the version of this article initially published, the institution name for affiliation 3 (Maryland Anderson Cancer Center) was incorrect. The correct institution is MD Anderson Cancer Center. The error has been corrected in the HTML and PDF versions of the article.
The original article can be found online at https://doi.org/10.1038/ni.3748