1. Rheumatology, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK;
2. Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK;
3. Department of Health Sciences, University of York, York, UK;
4. Centre for Musculoskeletal Research, University of Manchester, Manchester, UK;
5. Rheumatology, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK;
6. Rheumatology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK;
7. Paediatric Rheumatology, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK