1. School of Pharmacy, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
2. Department of Pharmacy, College of Medicine and Health Sciences, Wachemo University, Hossaena, Ethiopia
3. Department of Family and Preventive Medicine, School of Medicine, Emory University, Atlanta, GA
4. School of Medicine, College of Health Sciences, Addis Ababa University