1. a Department of Environmental Health, College of Health Sciences and Medicine, Dilla University, Dilla, Ethiopia
2. b Department of Environmental Health Science, College of Medicine and Health Science, Hawassa University, Hawassa, Ethiopia
3. c School of Public Health, College of Health Sciences and Medicine, Dilla University, Dilla, Ethiopia
4. d Department of Nursing, College of Health and Medical Sciences, Arsi University, Asalla, Ethiopia