1. South Auckland Clinical School; University of Auckland; Middlemore Hospital; Auckland; New Zealand
2. Medicine Education Student Office; Faculty of Medicine; University of New South Wales; Sydney; New South Wales; Australia
3. Division of Health Sciences, University of Otago; Dunedin; New Zealand
4. Council on Health Research for Development; Geneva; Switzerland
5. Department of Obstetrics and Gynaecology; University of Auckland; Auckland; New Zealand