Correction to: Nature Communications https://doi.org/10.1038/s41467-017-02359-6; published online 18 December 2017

In the original version of this Article, Figs. 4c and 4d contained incorrectly sized error bars. The correct version is:

figure 1

which replaces the previous incorrect version:

figure 2

This has now been corrected in both the PDF and HTML versions of the Article.