Nature Reviews Disease Primers 6, Article number: 22 (2020) https://doi.org/10.1038/s41572-020-0156-2 Published online 02 April 2020

The originally published article contained an error in Antonino Spinelli’s affiliation, which should have been listed as Humanitas Clinical and Research Center – IRCCS –, Rozzano, Milan, Italy, and Humanitas University, Department of Biomedical Sciences, Milan, Italy. This error has now been corrected in the HTML and PDF versions of the article.