Correction to: Nature Genetics https://doi.org/10.1038/s41588-019-0566-9, published online 13 January 2020.

In the version of this article initially published, author Anna Dodd was omitted from the author list and the Author Contributions; the color key for the heat map in Fig. 1a was omitted; x-axis labels in Extended Data Fig. 1a were omitted; and, in the ‘Single-cell RNA-seq analysis’ section in the Methods, “those with >1,000 genes expressed were removed from further analysis” should have read “those with <1,000 genes expressed were removed from further analysis.” The errors have been corrected in the HTML and PDF versions of the article.