1. Department of Surgery; Liverpool Hospital; Sydney New South Wales Australia
2. School of Medicine; University of Western Sydney; Sydney New South Wales Australia
3. Department of Colorectal Surgery; Concord Hospital; Sydney New South Wales Australia
4. Discipline of Surgery; Sydney Medical School; The University of Sydney; Sydney New South Wales Australia
5. Division of Anatomical Pathology; Concord Hospital; Sydney New South Wales Australia
6. Discipline of Pathology; Sydney Medical School; The University of Sydney; Sydney New South Wales Australia