Daniel Bowen1,2, James Ritchie Gill1,2, Pamela Garcia Pulido1,2, Joel Thomas Kirk Melton1,2, Mervyn Cross1,2. 1. Department of Trauma and Orthopaedics, Cambridge University Hospital, Addenbrooke's, Cambridge, United Kingdom. 2. Australian Institute for Musculoskeletal Research, North Sydney Orthopaedic and Sports Medicine Centre, Australia.