1. Department of Family health, Hosanna Health Science College, Hosanna, Ethiopia
2. Department of Epidemiology and Biostatistics, Institute of Public Health, College of Medicine & Health Sciences, University of Gondar, Gondar, Ethiopia
3. Department of Family Health, Hossana College of Health science
4. Department of Epidemiology and Biostatistics, School of Public Health, Haramaya University, Harar, Ethiopia
5. Department of Epidemiology and Biostatistics, School of Public Health, Wachemo University, Hossana, Ethiopia.