1. Department of Internal Medicine; Faculty of Medicine; Cairo University; Cairo; Egypt
2. Department of Medical Biochemistry and Molecular Biology; Faculty of Medicine; Cairo University; Cairo; Egypt
3. Department of Clinical Pathology; Faculty of Medicine; Cairo University; Cairo; Egypt
4. Department of Chemical Pathology; Faculty of Medicine; Cairo University; Cairo; Egypt
5. Department of General Surgery; Faculty of Medicine; Al-Azhar University; Cairo; Egypt