Correction to Lancet Rheumatol 2020; published online June 25. https://doi.org/10.1016/S2665-9913(20)30173-9

Guaraldi G, Meschiari M, Cozzi-Lepri A, et al. Tocilizumab in patients with severe COVID-19: a retrospective cohort study. Lancet Rheumatol 2020; published online June 25. https://doi.org/10.1016/S2665-9913(20)30173-9—in table 3 of this Article, the units should have been g/dL for haemoglobin, mg/dL for bilirubin, calcium, creatinine, and C-reactive protein, ng/mL for D-dimer and ferritin, and pg/mL for interleukin-6. In the Results section, in the thirteenth paragraph, the units for interleukin-6 should have been pg/mL. This correction has been made to the online version as of Sept 3, 2020.