1. UCL Institute of Orthopaedics & Musculoskeletal Science, Division of Surgery, Royal Free Hospital, MSK Lab, Imperial College London, Sir Michael Uren Hub Imperial College London White City Campus, London, and Department of Research & Innovation, Royal National Orthopaedic Hospital (RNOH), Brockley Hill, Stanmore, Middlesex, United Kingdom (A.J.G.)
2. UCL Comprehensive Clinical Trials Unit, Institute of Clinical Trials and Methodology, University College London, London, United Kingdom (K.C., E.B., J.B., E.L.D., C.J.D.)
3. Department of Research & Innovation, Royal National Orthopaedic Hospital (RNOH), Brockley Hill, Stanmore, Middlesex, United Kingdom (I.H., D.B.)
4. University Hospitals Sussex NHS Foundation Trust, Haywards Heath, United Kingdom (S.B.)
5. The Robert Jones and Agnes Hunt Orthopaedic Hospital NHS Foundation Trust, Oswestry, Shropshire, United Kingdom (A.B.)
6. Sheffield Teaching Hospitals NHS Trust, Northern General Hospital, Sheffield, United Kingdom (C.B.)
7. Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom (S.D.)
8. Liverpool University Hospitals NHS Foundation Trust, Fazakerley, Liverpool, United Kingdom (A.M.)
9. University Hospitals of Derby and Burton NHS Foundation Trust, Derby, United Kingdom (S.M.)
10. Wrightington, Wigan and Leigh NHS Foundation Trust, Wigan, Lancashire, United Kingdom (M.K.)
11. North Bristol NHS Trust, Bristol, United Kingdom (S.H.)
12. Newcastle Hospitals NHS Foundation Trust, Freeman Hospital, Newcastle upon Tyne, United Kingdom (M.S.)
13. Norfolk and Norwich University Hospitals NHS Foundation Trust, Norfolk and Norwich University Hospital, Norwich, United Kingdom (D.T.L.)
14. Hull University Teaching Hospitals NHS Trust, Hull Royal Infirmary, Hull, United Kingdom (V.M.)
15. Oxford University Hospitals NHS Trust, Nuffield Orthopaedic Centre, Oxford, United Kingdom (P.C.)
16. Royal Surrey NHS Foundation Trust, Guildford, Surrey, United Kingdom (P.H.)
17. Northumbria Healthcare NHS Foundation Trust, Tyne and Wear, North Shields, United Kingdom (D.T.)
18. Surrey Clinical Trials Unit, University of Surrey, Guildford, Surrey, United Kingdom (S.S.S.).