Correction to: Genes and Immunity (2014) 15, 82–87; doi:10.1038/gene.2013.65; published online 16 January 2014

Since the publication of this paper, the authors have noted that reference 52 is a retracted paper. They wish to replace this with the following paper:

Peterson DA, DiPaolo RJ, Kanagawa O, Unanue ER. Quantitative analysis of the T cell repertoire that escapes negative selection. Immunity 1999; 11: 453–462.

The authors apologise for any inconvenience caused.