1. Department of Clinical Pathology; Faculty of Medicine; Assiut University; Assiut Egypt
2. Department of Clinical and Chemical Pathology; Faculty of Medicine; South Valley University; Qena Egypt
3. Microbiology and Immunology Department; Faculty of Medicine; Assiut University; Assiut Egypt
4. Department of Pediatrics, children hospital; Faculty of Medicine; Assiut University; Assiut Egypt