1. Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
2. Physiotherapy Research Unit, Nuffield Orthopaedic Centre, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
3. Centre for Statistics in Medicine, Oxford Clinical Trials Research Unit, University of Oxford, Oxford, UK
4. Health Economics Research Centre, Nuffield Department of Population Health, University of Oxford, Oxford, UK
5. Warwick Clinical Trials Unit, Warwick Medical School, University of Warwick, Coventry, UK
6. School of Health Sciences, University of Nottingham, Nottingham, UK
7. Patient and public involvement member
8. School of Medicine and Health, University of Exeter, Exeter, UK