1. Department of Spinal Surgery, Brighton and Sussex University Hospitals NHS Trust, Royal Sussex County Hospital NHS Foundation Trust, Brighton, UK.
2. Department of Trauma and Orthopaedics, Brighton and Sussex University Hospitals NHS Trust, Brighton, UK.
3. Department of Trauma and Orthopaedics, Royal Surrey County Hospital NHS Foundation Trust, Guildford, UK.
4. Department of Spinal Surgery, Brighton and Sussex University Hospitals NHS Trust, Brighton, UK.
5. Frimley Health NHS Foundation Trust, Frimley Park Hospital, Camberley, UK.