1. Department of Health Policy and Management, Jimma University, Jimma, Ethiopia
2. Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston, U.S.A
3. Department of Health, Behaviour and Society, Jimma University, Jimma, Ethiopia
4. Department of Population and Family Health, Jimma University, Jimma, Ethiopia
5. University of Glasgow
6. London School of Hygiene and Tropical Medicine, London, UK