1. Department of Trauma and Orthopaedics, University College London Hospital, London, UK
2. Cutrale Perioperative and Ageing Group, Department of Bioengineering, Imperial College London, London, UK
3. Department of Trauma and Orthopaedics, Royal Surrey County Hospital NHS Foundation Trust, Guildford, UK
4. Department of Trauma and Orthopaedics, Kingston Hospital NHS Foundation Trust, Kingston, UK