Nat. Immunol. 17, 1467–1478 (2016); published online 24 October 2016; corrected after print 28 November 2016

In the version of this article initially published, the word 'products' was misspelled (as 'prducts') in the final sentence of the third paragraph of the introduction; in Table 1, the third column was incorrectly labeled 'FDR' instead of the correct 'Genes in set'; the citation in the penultimate sentence of paragraph 1 of the third Results subsection (Chemokine and homing receptors) was incorrectly noted as a Supplementary Figure and should be cited as “(Fig. 3b)” instead; in Figure 5f, the P values defining the horizontal dashed lines were not visible and should be moved right for greater visibility, and each is P = 0.05; and in the legend to Figure 6b, 'CPM' was incorrectly defined as 'counts per minute' instead of the correct 'counts per million'. These errors have been corrected in the HTML and PDF versions of the article.