1. University of Liverpool, Liverpool, England
2. Human Development Research Foundation, Islamabad, Pakistan
3. Lady Reading Hospital, Peshawar, Pakistan
4. University of New South Wales, Sydney, Australia
5. VU University Amsterdam, Amsterdam, the Netherlands
6. Liverpool School of Tropical Medicine, Liverpool, England
7. Lady Reading Hospital, Peshawar, Pakistan7Research Institute for Primary Care & Health Sciences, Keele University, Staffordshire, England
8. World Health Organization, Geneva, Switzerland