Nat. Genet.; 10.1038/ng.3659; corrected online 19 September 2016

In the version of this article initially published online, the mutation signature illustrations for S1 and S2 in Figure 3a were switched. Additionally, in the Online Methods, the text originally stated that structural variants were called using BWA-MEM, when it should have stated that these were called using BWA. These errors have been corrected for the print, PDF and HTML versions of this article.