1. Clinical Hematology Unit, Internal Medicine Department Zagazig University Zagazig Egypt
2. Internal Medicine Department Zagazig University Zagazig Egypt
3. Clinical Pathology Department Zagazig University Zagazig Egypt
4. Medical Microbiology and Immunology Department Zagazig University Zagazig Egypt
5. Chest Department Zagazig University Zagazig Egypt
6. Family Medicine Department Zagazig University Zagazig Egypt