1. Arthritis Research UK Centre for Adolescent Rheumatology, University College London, London, UK
2. Arthritis Research UK Centre for Epidemiology, University of Manchester, Manchester, UK
3. Department of Academic Rheumatology, Faculty of Life Sciences & Medicine, London, UK
4. Psychology Department, Institute of Psychiatry Psychology and Neuroscience, Kings College London, London, UK
5. Department of Clinical Pharmacology, William Harvey Research Institute, Queen Mary University of London, London, UK
6. Child and Adolescent Psychological Services, University College London Hospital NHS Foundation Trust, London, UK
7. Paediatric Rheumatology, Institute Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
8. Department of Rheumatology, Alder Hey Children’s Foundation NHS Trust Liverpool, Liverpool, UK
9. Department of Rheumatology, Royal Manchester Children’s Hospital, Manchester, UK
10. Department of Rheumatology, Royal Hospital for Children, Glasgow, UK
11. Paediatric Rheumatology, Royal Hospital for Sick Children, Edinburgh, UK
12. UCL GOS Institute of Child Health, University College London, London, UK