Correction to: Nature https://doi.org/10.1038/s41586-018-0118-y, published online 16 May 2018.

In this Letter, the surname of author Lena Vlaminck was misspelled ‘Vlaeminck’. In addition, author Kris Vleminckx should have been associated with affiliation 16 (Center for Medical Genetics, Ghent University, Ghent, Belgium). These have been corrected online.