1. Department of Pharmacology and Clinical Pharmacy, School of Pharmacy, Addis Ababa University, Addis Ababa, Ethiopia
2. Center for Innovative Drug Development and Therapeutic Trials for Africa (CDT-Africa), Addis Ababa University, Addis Ababa, Ethiopia
3. Department of Pharmacology and Toxicology, School of Pharmacy, Jimma University, Jimma, Ethiopia