Correction to: Nature Cell Biology https://doi.org/10.1038/s41556-020-00611-8, published online 8 January 2021

In the version of this Article originally published, two colors in the key for Fig. 7a were incorrect. The circles for ‘allantois’ and ‘endothelium’ should be purple and green, respectively, instead of shades of grey. The errors have been corrected.