Nature 537, 412–428 (2016); doi:10.1038/nature19317

In this Letter, owing to errors introduced by the typesetters, ‘CXCR5+’ should have been ‘CXCR5’ at two places in the Abstract, to read as follows: “…more potent cytotoxicity than the CXCR5 subset…” and “…greater therapeutic potential than the CXCR5 subset …”. In addition, author Cheng Liu should have been listed as an equally contributing author, and in the Fig. 3b legend, ‘Id−/− mice’ should have been ‘Id2−/− mice’. In the main text, ‘me3H3k27’ should have been ‘me3H3K27’, and two occurrences of ‘CD8 T cells’ should have referred to ‘CD8+ T cells’. These errors have been corrected in the online versions of the paper.