Greenhalgh Trisha, Knight Matthew, Inda-Kim Matt, Fulop Naomi J, Leach Jonathan, Vindrola-Padros Cecilia
Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK
West Hertfordshire Hospitals NHS Trust, Hertfordshire, UK.
BMJ. 2021 Mar 25;372:n677. doi: 10.1136/bmj.n677.