1. Pfizer Worldwide Research and Development, Pharm Sci and PGS Statistics Groton Connecticut United States
2. Department of Geography and Rural Development Kwame Nkrumah University of Science and Technology Kumasi Ghana
3. Department of Planning Kwame Nkrumah University of Science and Technology Kumasi Ghana
4. Social Policy Research Centre University of New South Wales Sydney New South Wales Australia
5. Centre for Primary Health Care and Equity University of New South Wales Sydney New South Wales Australia