Nat. Immunol. 16, 386–396 (2015); published online 9 February 2015; corrected after print 20 March 2015

In the version of this article initially published, the gray box in the key in the left graph in Figure 6a is labeled incorrectly. The correct label should be Plvap−/−. The error has been corrected in the HTML and PDF versions of the article.