1. School of Nursing, Institute of Health, Jimma University, Jimma, Ethiopia
2. Faculty of Public Health, Department of Epidemiology, Jimma University, Institute of Health, Jimma, Ethiopia
3. Faculty of Public Health, Department of Health Policy and Management, Jimma University, Institute of Health, Jimma, Ethiopia
4. Faculty of Public Health, Population and Family Health Department, Jimma University, Institute of Health, Jimma, Ethiopia