Affiliation: | 1. Department of Gastroenterology, Middlemore Hospital, Counties Manukau District Health Board, Auckland, New Zealand;2. Department of Medicine, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand;3. Department of Medicine, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand Gastroenterology Unit, Dunedin Public Hospital, Southern District Health Board, Dunedin, New Zealand |