1. 1Faculty of medical laboratory sciences, Omdurman Islamic University, Sudan.
2. 2Department of hematology and immunohematology, College of medical laboratory science, Sudan University of Science and Technology, Khartoum, Sudan.
3. 3Institute of Endemic Diseases, University of Khartoum, Sudan.
4. 4Faculty of medical laboratory sciences, University of medical sciences and Technology, Khartoum, Sudan.
5. 5Faculty of medical laboratory sciences, Alzaeim alazhari university Khartoum, Sudan.