Nat. Immunol. 5, 1124–1133 (2004); published online 10 October 2004; corrected online 24 February 2014

In the version of this article initially published, the top row of Figure 2c incorrectly presented identical plots for diffDC and diffDC-LPS. As the source of the original data was unusable, the plots have been replaced with data obtained in new experiments. The error has been corrected in the HTML and PDF versions of the article.