1. Department of Hematology, School of Biomedical and Laboratory Sciences, College of Medicine and Health Sciences, University of Gondar, P.O. Box 196, 6200 Gondar, Ethiopia
2. Department of Medical Microbiology, School of Biomedical and Laboratory Sciences, College of Medicine and Health Sciences, University of Gondar, 6200 Gondar, Ethiopia
3. Department of Immunology and Molecular Biology, School of Biomedical and Laboratory Sciences, College of Medicine and Health Sciences, University of Gondar, 6200 Gondar, Ethiopia
4. Department of Hematology, School of Biomedical and Laboratory Sciences, College of Medicine and Health Sciences, University of Gondar, 6200 Gondar, Ethiopia