Correction to: Nature Methods, published online 30 November 2018.

In the version of this article initially published, all coefficients of variation taken from published papers in the literature meta-analysis, appearing in Fig. 1 and Supplementary Table 1, were doubled. This does not affect the conclusions of the paper, as the erroneous transformation was applied to all values. The error has been corrected in the PDF and HTML versions of the article.