1. Department of Orthopaedic Surgery, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia
2. Sydney Medical School, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
3. School of Medicine, Sydney Campus, The University of Notre Dame Australia, Sydney, New South Wales, Australia
4. Surgical Outcomes Research Centre (SOuRCe), Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia
5. Institute of Academic Surgery, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia