1. Arba Minch College of Health Sciences, P.O. Box 155, Arba Minch, Ethiopia
2. Addis Continental Institute of Public Health, P.O. Box 1140, Addis Ababa, Ethiopia
3. Department of Public Health, Arba Minch University, P.O. Box 21, Arba Minch, Ethiopia
4. Centres for International Health, University of Bergen, Bergen, Norway