1. Department of Pharmacy, College of Medicine and Health Sciences, Adigrat University, Adigrat, Ethiopia
2. Department of Pediatrics, St. Paul’s Hospital Millennium Medical College, Addis Ababa, Ethiopia
3. School of Pharmacy, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
4. School of Pharmacy, College of Health Sciences, Aksum University, P.O. Box: 298, Aksum, Ethiopia