1. Leeds Teaching Hospitals NHS Trust and University of Leeds, Leeds, UK
2. Leeds Teaching Hospitals NHS Trust, Leeds, UK
3. Royal Manchester Children’s Hospital, Manchester, UK
4. Hull University Teaching Hospitals NHS Trust, Hull, UK
5. Alder Hey Children’s Hospital NHS Foundation Trust, Liverpool, UK
6. Sheffield Children’s Hospital, Sheffield, UK
7. Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, Leeds, UK
8. Institute of Health Science, University of Leeds, Leeds, UK