Nat. Immunol. 11, 975–978 (2010); published online 19 October 2010; corrected after print 12 November 2010

In the version of this article initially published, a group of author names and their affiliation in the FOCIS Human Immunophenotyping Consortium was incorrect. The correct names and affiliation are as follows: Paola Di Meglio, Frank O. Nestle, Mark Peakman and Federica Villanova are at King's College London, London, UK. The error has been corrected in the HTML and PDF versions of the article.