1. Clinical Pathology Department; Hematology Unit; Mansoura Medical School; Mansoura University; Egypt
2. Faculty of Medicine; Clinical Pathology Department; Zagazig University; Egypt
3. College of Medicine; Pathology Department; King Khaled University; Abha KSA
4. Tropical Medical Department; Mansoura Medical School; Mansoura University; Egypt
5. Community Medicine Department; Mansoura Medical School; Mansoura University; Egypt