1. Habesha Breweries S.C., Addis Ababa, Ethiopia
2. Department of Biomedical Sciences, Faculty of Medical Sciences, Jimma University, Jimma, Ethiopia
3. Department of Environmental Health, College of Health Science, Debre Markos University, Debre Markos, Ethiopia
4. Deparment of Public Health, Asrat Woldeyes Health Science Campus, Debre Berhan University, Debre Berhan, Ethiopia