1. MRC Lifecourse Epidemiology Centre, University of Southampton , Southampton SO16 6YD , UK
2. Paediatric Endocrinology, University Hospital Southampton NHS Foundation Trust , Southampton SO16 6YD , UK
3. Department of Rheumatology, University Hospital Southampton NHS Foundation Trust , Southampton SO16 6YD , UK
4. NIHR Applied Research Collaboration Wessex, Southampton Science Park, Innovation Centre , Southampton, SO16 7NP , UK
5. Faculty of Medicine, University of Southampton , Southampton SO16 6YD , UK
6. NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust , Southampton SO16 6YD , UK
7. NIHR Biomedical Research Centre, University of Oxford , Oxford OX4 2PG , UK