Department of Trauma and Orthopaedic Surgery, University College Hospital, London, UK.Institute of Sports, Health and Exercise, University College Hospital, London, UK.Department of Trauma and Orthopaedic Surgery, University College Hospital, London, UK.Institute of Sports, Health and Exercise, University College Hospital, London, UK.Department of Trauma and Orthopaedic Surgery, University College Hospital, London, UK.Institute of Sports, Health and Exercise, University College Hospital, London, UK.Department of Trauma and Orthopaedic Surgery, University College Hospital, London, UK.Institute of Sports, Health and Exercise, University College Hospital, London, UK.Department of Trauma and Orthopaedic Surgery, University College Hospital, London, UK.Institute of Sports, Health and Exercise, University College Hospital, London, UK.Institute of Sports, Health and Exercise, University College Hospital, London, UK.