1. Department of Public Health, College of Health Sciences, Arsi University, Arsi, Ethiopia
2. Department of Biostatistics, School of Public Health, Addis Ababa University, Addis Ababa, Ethiopia
3. Department of Epidemiology and Biostatistics, Addis Continental Institute of Public Health, Addis Ababa, Ethiopia
4. Department of Reproductive Health and Population, Addis Continental Institute of Public Health, Addis Ababa, Ethiopia