1. Upper Gastrointestinal Surgical Unit; Royal North Shore Hospital and North Shore Private Hospital; The University of Sydney; St Leonards New South Wales Australia
2. Department of Anatomical Pathology; Royal North Shore Hospital and North Shore Private Hospital; The University of Sydney; St Leonards New South Wales Australia
3. Department of Microbiology and Infectious Diseases; Royal North Shore Hospital and North Shore Private Hospital; The University of Sydney; St Leonards New South Wales Australia
4. Department of Radiology; Royal North Shore Hospital and North Shore Private Hospital; The University of Sydney; St Leonards New South Wales Australia