1. Department of Medical Physiology, Faculty of Medicine, Mansoura University, Mansoura, Egypt
2. Department of Internal medicine (Endocrine and Diabetes), Faculty of Medicine, Mansoura University, Mansoura, Egypt
3. Department of Veterinary Pathology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
4. Medical Experimental research center, Faculty of Medicine, Mansoura University, Mansoura, Egypt
5. Department of Anatomy and Embryology, Faculty of Medicine, Mansoura University, Mansoura, Egypt