1. Medical Biochemistry Department; Faculty of Medicine, Zagazig University; Zagazig Egypt
2. Medical Microbiology & Immunology; Faculty of Medicine, Zagazig University; Zagazig Egypt
3. Medical Laboratories Department; Faculty of Applied Medical Sciences, Taif University; Taif Saudi Arabia
4. Anatomy & Embryology Department, Faculty of Medicine; Zagazig University; Zagazig Egypt