1. Medical Physiology Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt
2. Department of internal Medicine and endocrinology, Delta University, Gamasa, Egypt
3. Pathology Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt
4. Medical Biochemistry Department, Faculty of Medicine, Mansoura, University, Mansoura, Egypt
5. Medical Experimental Research Centre, Faculty of Medicine, Mansoura University, Mansoura, Egypt