1. Department of Public Health, Madda Walabu University Goba Referral Hospital, Bale-Goba, Ethiopia
2. Department of Community Health, College of Health Science, Addis Ababa University, Ethiopia
3. Department of Human Anatomy, Madda Walabu University Goba Referral Hospital, Bale-Goba, Ethiopia
4. Department of Public Health, College of Medicine and Health Science, Wachemo University, Hossana, Ethiopia
5. Department of Epidemiology and Biostatistics, College of Medicine and Health Sciences, Institute of Public Health, University of Gondar, Gondar, Ethiopia