1. Department of Surgery Townsville Hospital Townsville Queensland Australia
2. Faculty of Medicine and Health, Central Clinical School The University of Sydney Sydney New South Wales Australia
3. Surgical Outcomes Research Centre (SOuRCe) Royal Prince Alfred Hospital Camperdown New South Wales Australia
4. Concord Institute of Academic Surgery Concord Hospital Concord New South Wales Australia
5. Department of Surgery Peninsula Health Melbourne Victoria Australia
6. Department of Surgery Bendigo Health Bendigo Victoria Australia