1. University of Liverpool, Liverpool, UK
2. Consultant Orthopaedic Trauma Surgeon, Liverpool Orthopaedic and Trauma Service, Liverpool University Teaching Hospital Trust, Liverpool, UK.
3. Department of Musculoskeletal Biology, University of Liverpool, Liverpool, UK
4. Consultant Orthopaedic Trauma Surgeon, Department of Orthopaedic and Trauma Surgery, Countess of Chester Hospital, Chester, UK.
5. Groote Schuur Hospital, Cape Town, South Africa.
6. Division of Orthopaedic Surgery, Groote Schuur Hospital, Cape Town, South Africa.