Nat. Biotechnol. 34, 588–591 (2016); published online 9 June 2016; corrected after print 11 August 2016

In the version of this article initially published, the competing financial interests line should have been positive in the HTML as it was in the PDF (“The authors declare competing financial interests”). The statement “M.S. is a co-founder of Personalis and SensOmics and a member of the scientific advisory boards of Personalis, SensOmics and Genapsys” should also have appeared in the HTML. The errors have been corrected in the HTML and PDF versions of the article.