1. Sexual & Reproductive Health Unit, Papua New Guinea Institute of Medical Research, Goroka, Papua New Guinea
2. Kirby Institute for Infection and Immunity in Society, UNSW Sydney, Sydney, Australia
3. Centre for Social Research in Health, UNSW Sydney, Sydney, Australia
4. Australian Institute of Health Innovation, Macquarie University, Sydney, Australia
5. School of Public Health and Community Medicine, UNSW Sydney, Sydney, Australia