1. Department of Trauma and Orthopaedics, Burton Hospital NHS Foundation Trust, Burton Upon Trent, UK
2. Department of Trauma and Orthopaedics, Royal Free Hospitals London NHS Foundation Trust, London, UK
3. East Kent University Hospital NHS Foundation Trust, Queen Elizabeth The Queen Mother Hospital, Margate, UK
4. University Hospital of Wales, Cardiff, UK
5. Royal Wolverhampton NHS Trust, New Cross Hospital, Wolverhampton, UK