Correction to: Nature Methods https://doi.org/10.1038/s41592-019-0612-7, published online 21 October 2019.

This paper was originally published under standard Springer Nature copyright (© The Author(s), under exclusive licence to Springer Nature America, Inc.). As of the date of this correction, the paper is available online as an open-access paper under a Creative Commons Attribution 4.0 license.