Nat. Genet. 43, 329–332 (2011); published online 13 March 2011; corrected online 12 October 2011

In the version of this article initially published, three authors, Paul Richardson, Ikram Nasr and Richard Aspinall, were inadvertently omitted from the list of the members of the UK PBC Consortium provided in the Supplementary Note. The error has been corrected in the supplementary information file.