Nat. Med. 22, 1303–1313 (2016); published online 24 October 2016; corrected after print 26 January 2017

In the version of this article initially published, the western blot in Figure 2a for the BT474 cell line was incorrect. In addition, one of the accession codes for gene expression data for the Guy's Hospital TNBC-enriched cohort was incorrect. The errors have been corrected in the HTML and PDF versions of the article.