1. Department of Public Health, College of Health Sciences, Woldia University, Woldia, Ethiopia
2. Department of Public Health, College of Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia
3. Department of Nursing, College of Health Sciences, Oda Bultum University, Chiro, Ethiopia
4. Department of Mathematics, College of Natural and Computational Sciences, Debre Tabor University, Debre Tabor, Ethiopia