Nature Reviews Rheumatology (2018) https://doi.org/10.1038/s41584-018-0065-x Published online 14 August 2018

In the section ‘Combining B cell-targeted therapies’ in the originally published version of this article, the 24-week interim analysis for the CALIBRATE study was incorrectly given as the 2- to 4-week interim analysis. This error has now been corrected in the HTML and PDF versions of the manuscript.