Correction to: Nature https://doi.org/10.1038/s41586-021-04194-8Published online 8 December 2021

In the version of this article initially published, there was an error in Fig. 4a. In the original version, breaks in the straddle line to indicate which columns pertain to the top-most labels “No Abx” and “Abx” were missing, while “Abx” was centered over the last two columns, rather than the last three columns (resp., “None,” “PBS” and “DMG.”). The errors have been corrected in the HTML and PDF versions of the article