Nature 494, 492–496 (2013); doi:10.1038/nature11935

In this Letter we inadvertently omitted full details of The Cancer Genome Atlas data sets. The Acknowledgements should have included these sentences: “The results published here are in part based upon data generated by The Cancer Genome Atlas pilot project established by the NCI and NHGRI. Information about The Cancer Genome Atlas and the investigators and institutions that constitute The Cancer Genome Atlas Research Network can be found at http://cancergenome.nih.gov/. The data were retrieved through dbGaP authorization (accession numbers phs000178.v4.p4 and phs000178.v5.p5).”.