Correction to: Nature Methods https://doi.org/10.1038/s41592-019-0510-z, published online 19 August 2019.

In Fig. 3 of the version of this Brief Communication originally published, the bottom right graph was incorrectly labelled as panel b; the correct panel label is g. In addition, in the y axis label of this panel, the units ‘AU’ should have been ‘a.u.’ This figure has now been amended in all online versions.