1 Orthopaedic Trauma/Limb Reconstruction Unit, Orthopaedic Trauma/Limb Reconstruction Unit, St George's University Hospital, London, United Kingdom.
2 Oxford Clinical Trials Research Unit, Centre for Statistics in Medicine, Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom.
3 Clinical Trials Unit, Warwick Medical School, University of Warwick, Coventry, United Kingdom.
4 Oxford Trauma and Emergency Care, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom.