Philip Keir E J, Tidswell Robert, McFadyen Charles
National Heart and Lung Institute, Imperial College London, Royal Brompton Campus, London SW3 6HP, UK.
Bloomsbury Institute for Intensive Care Medicine, University College London, Centre for Intensive Care Medicine, Cruciform Building, London, UK.
BMJ. 2021 Feb 2;372:n298. doi: 10.1136/bmj.n298.