1. Australian Orthopaedic Association National Joint Replacement Registry, SAHMRI, Adelaide, Australia
2. Michigan Arthroplasty Registry Collaborative Quality Initiative University of Michigan, Department of Orthopaedic Surgery, Ann Arbor, Michigan, USA
3. Geneva Arthroplasty Registry, Geneva University Hospitals Rue Gabrielle-Perret-Gentil 4 CH-1211 Geneva, Switzerland
4. Surgical Outcomes and Analysis Unit, Kaiser Permanente National Implant Registries 8954 Rio San Diego Drive, Suite, San Diego, California, USA
5. Dutch Arthroplasty Register (Landelijke Registratie Orthopedische Implantaten (LROI)), Bruistensingel 230 | 5232 AD ’s-Hertogenbosch, The Netherlands
6. Department of Oncology and Metabolism, University of Sheffield, Beech Hill Road, Sheffield, United Kingdom
7. National Joint Replacement for England, Wales, Northern Ireland, Isle of Man and the States of Guernsey (NJR)