Correction to: Nature Reviews Gastroenterology & Hepatology https://doi.org/10.1038/s41575-020-0293-9, published online 17 April 2020.

The originally published article contained errors in the affiliations for Silvio Danese, which should have been listed as IBD Center, Department of Gastroenterology, Humanitas Clinical and Research Center – IRCCS –, Rozzano, Milan, Italy and Department of Biomedical Sciences, Humanitas University, Pieve Emmanuele, Milan, Italy, respectively. These errors have now been corrected in the HTML and PDF versions of the manuscript.