Correction to: Nature Communications; https://doi.org/10.1038/s41467-018-05570-1; published online 13 August 2018

The original version of this Article contained an error in Fig. 4. In panel a, the colour code for hot and cold clusters was inadvertently inverted. In the correct version of panel a, the hot clusters are blue and the cold clusters are yellow. This error has now been corrected in both the PDF and HTML versions of the Article.