Correction to: Nature Neuroscience, published online 22 June 2020.

In the version of this article initially published, errors appeared in Fig. 2d,j. In Fig. 2d, the axes of the bottom graph should appear in front of the data; in Fig. 2j, the cell count should start at 1 rather than at 0. The errors have been corrected in the PDF and HTML versions of this article.

Fig. 2
figure 1

Original and Corrected.