1. St George's Hospital, London, UK
2. St George's University of London, London, UK
3. Royal Manchester Children's Hospital, Manchester, UK
4. North West Anglia NHS Foundation Trust, Peterborough, UK
5. Oxford University Hospitals NHS Foundation Trust, Oxford, UK
6. James Cook University Hospital, Middlesbrough, UK
7. Newcastle Upon Tyne Hospitals NHS Trust, Newcastle, UK
8. Royal National Orthopaedic Hospital NHS Trust, London, UK
9. Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Science, University of Oxford, Oxford, UK