Published: 26 March 2020 Nature Reviews Disease Primers 6, Article number: 20 (2020) https://doi.org/10.1038/s41572-020-0153-5 Published online 26 March 2020

In the originally published version, an acknowledgement was not included. This section has now been updated to state: L.L.S. acknowledges NIH funding for her research (R01DK101495 and R01DK103915).