1. Botnar Musculoskeletal Research Centre, Nuffield Orthopaedic Centre, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Windmill Road, Oxford, OX3 7LD, UK
2. John Radcliffe Hospital, Headley Way, Oxford OX3 9DU, UK
3. Abertawe Bro Morgannwg University Health Board, Morriston Hospital, Morriston, Swansea SA6 6NL, UK
4. South Yorkshire Deanery, Northern General Hospital, Sheffield, UK
5. Health Education North West, Regatta Place, Brunswick Business Park, Liverpool, L3 4BL, UK
6. West Midlands, Queen Elizabeth Medical Centre, University Hospital Birmingham, Birmingham B15 2TH, UK
7. Botnar Musculoskeletal Research Centre, Nuffield Orthopaedic Centre, University of Oxford, Windmill Road, Oxford, OX3 7LD, UK