1. Department of Medicine; Dunedin School of Medicine; University of Otago; Dunedin New Zealand
2. Department of Preventive and Social Medicine; University of Otago; Dunedin New Zealand
3. Department of Oncology; Southern District Health Board; Dunedin New Zealand
4. Department of Surgery; Dunedin School of Medicine, University of Otago; Dunedin New Zealand
5. Department of Surgery, Dunedin Hospital; Southern District Health Board; Dunedin New Zealand
6. Department of Gastroenterology; Southern District Health Board; Dunedin New Zealand