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