1. Department of Pharmaceutics and Social Pharmacy, School of Pharmacy, College of Health Sciences, Addis Ababa University, P.O. Box 9086, Addis Ababa, Ethiopia
2. Department of Pharmacy, College of Health Sciences and Medicine, Wolaitta Soddo University, P.O. Box 158, Wolaitta Soddo, Ethiopia
3. Center for Innovative Drug Development and Therapeutic Trials for Africa (CDT-Africa), College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia