1. Healthcare Improvement Scotland, Glasgow, G1 2NP, UK
2. Centre for Patient Reported Outcome Research, Institute of Applied Health Research, University of Birmingham, Birmingham, B15 2TT, UK
3. National Institute for Health Research, Birmingham Biomedical Research Centre, University of Birmingham, Birmingham, B15 2TT, UK
4. National Institute for Health Research (NIHR) Applied Research Centre West Midlands, University of Birmingham, Birmingham, B15 2TT, UK
5. Health Technology Wales, Cardiff, CF10 4PL, UK
6. University Hospital Birmingham NHS Foundation Trust, Birmingham, B15 2GW, UK
7. Velindre University NHS Trust, Nantgarw, Cardiff, CF15 7QZ, UK
8. National Institute for Health Research Surgical Reconstruction & Microbiology Research Centre, University of Birmingham, Birmingham, B15 2TT, UK