1. Department of Pharmacology and Clinical Pharmacy, School of Pharmacy, College of Health Sciences, Addis Ababa University , P.O. Box 9086, Addis Ababa , Ethiopia
2. Department of Bioscience Engineering, Faculty of Sciences, University of Antwerp , Groenenborgerlaan 171, 2020 Antwerp , Belgium
3. Bacterial and Viral Diseases Research Directorate, Armauer Hansen Research Institute , P.O. Box 1005, Addis Ababa , Ethiopia