Correction to Lancet Respir Med 2021; published online May 14. https://doi.org/10.1016/S2213-2600(21)00177-6

Supady A, Weber E, Rieder M et al. Cytokine adsorption in patients with severe COVID-19 pneumonia requiring extracorporeal membrane oxygenation (CYCOV): a single centre, open-label, randomised, controlled trial. Lancet Respir Med 2021; published online May 14. https://doi.org/10.1016/S2213-2600(21)00177-6—In table 2 of this Article, the data for the control group for “Retrieval on ECMO by mobile ECMO retrieval team from another hospital” should have read “4 (24%)”, and the appendix has been corrected. These corrections have been made to the online version as of June 4, 2021, and will be made to the printed version.