Nat. Immunol. 6, 579–586 (2005); published online 15 May 2005; corrected after print 16 January 2009

In the version of this article initially published, the dose of D-galactosamine for the endotoxic shock experiments described in the Methods section (20 μg) was incorrect. The correct dose is 20 mg. The error has been corrected in the HTML and PDF versions of the article.