Correction to: Nature Methods https://doi.org/10.1038/s41592-019-0675-5, published online 6 January 2020.

In the version of this article initially published, an accession code was given in the Data Availability section and the Fig. 4 legend as EMD-13436; the correct code is EMD-10436. In the Data Availability section, the link for accession code EMD-10449 did not connect to the correct database page; the link has been repaired. The errors have been corrected in the print, PDF and HTML versions of the article.