Published on in Vol 24 , No 5 (2022) :May

1 East London NHS Foundation Trust, London, GB
2 Centre for Health Services Research, School of Health Sciences, City, University of London, London, GB
3 Brighton and Sussex University Hospitals NHS Trust, Brighton, GB
4 University College London Great Ormond Street Institute of Child Health, University College London, London, GB
5 Centre for Adolescent Rheumatology Versus Arthritis, London, GB
6 National Institute for Health Research Biomedical Research Centre at Great Ormond Street Hospital, London, GB
7 See Acknowledgments, London, GB
*these authors contributed equally