1. Department of Orthopaedics, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
2. Stanmore Royal National Orthopaedic Hospital, Stanmore, Middlesex, UK
3. Dalhousie University and Queen Elizabeth II Health Sciences Center, Halifax, Nova Scotia, Canada
4. Northern General Hospital, Sheffield, UK
5. Dalhousie University and Memorial University of Newfoundland, Fredericton, New Brunswick, Canada
6. University of Calgary, Calgary, Alberta, Canada
7. St George’s Hospital, London, UK
8. University of Alberta, Edmonton, Alberta, Canada
9. Frimley Park Hospital, Frimley, Camberley, Surrey, UK
10. Royal Surrey County Hospital, Guildford, Surrey, UK
11. Torbay Hospital, Torquay, Devon, UK
12. Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
13. Division of Orthopaedic Surgery, St Michael’s Hospital, Toronto, Ontario, Canada