Nature Reviews Neuroscience (2020) Published online 2 June 2020

The originally published article contained an error in the references. The following paper was incorrectly included as ref. 47: Gur, E. et al. The variability of organ weight background data in rats. Omics 27, 65–72 (1999). The paper that should have been included as ref. 47 is: Åhlgren, J. & Voikar, V. Housing mice in the individually ventilated or open cages — does it matter for behavioral phenotype? Genes Brain Behav. 18, e12564 (2019). This has been corrected in the HTML and PDF versions of the manuscript.