1. Division of Surgery, Northern Health , Epping, Victoria , Australia
2. Department of Anaesthetics, Northern Health , Epping, Victoria , Australia
3. Department of Medical Education, University of Melbourne , Epping, Victoria , Australia
4. Department of Surgery, University of Melbourne , Epping, Victoria , Australia
5. Department of Surgery, University Hospital Geelong, Barwon Health , Geelong, Victoria , Australia
6. Department of Surgery, Deakin University , Geelong, Victoria , Australia