1. Arthritis Research UK Centre for Epidemiology, Centre for Musculoskeletal Research, Institute of Inflammation and Repair, The University of Manchester, Manchester Academic Health Science CentreManchesterUK
2. Newcastle University and Great North Children's Hospital, Newcastle Hospitals NHS Foundation TrustNewcastle upon TyneUK
3. Arthritis Research UK Centre for Epidemiology, Centre for Musculoskeletal Research, Institute of Inflammation and Repair, Manchester Academic Health Science Centre, and Institute of Population Health, The University of ManchesterManchesterUK
4. Alder Hey Children's Foundation NHS Trust, HospitalLiverpoolUK
5. UCL Institute of Child Health, Arthritis Research UK Centre for Adolescent Rheumatology at UCL, UCLH and GOSH, and Great Ormond Street HospitalLondonUK
6. Royal Hospital for Sick Children, Greater Glasgow and Clyde Health Board, Glasgow, and Royal Hospital for Sick ChildrenEdinburghUK
7. Arthritis Research UK Centre for Adolescent Rheumatology, University College LondonLondonUK
8. The Royal Manchester Children's HospitalManchesterUK
9. Arthritis Research UK Centre for Epidemiology, Centre for Musculoskeletal Research, Institute of Inflammation and Repair, The University of Manchester, NIHR Manchester Musculoskeletal Biomedical Research Unit, Central Manchester NHS Foundation Trust, Manchester Academic Health Sciences CentreManchesterUK