1. The National Joint Registry of England, Wales, Northern Ireland and the Isle of Man, UK
2. Centre for Hip Surgery, Wrightington Hospital, UK
3. Head of Health Registries, Northgate Public Services, Peoplebuilding 2, Hemel Hempstead, Hertfordshire, England
4. Royal Derby Hospital, Derby, UK
5. West Suffolk NHS Foundation Trust, UK
6. University of Sheffield, Sheffield, UK