1. Department of Physiology, Kasr Al-Aini Faculty of Medicine, Cairo University, Cairo, Egypt
2. Department of Anatomy and Embryology, Faculty of Medicine, Cairo University, Cairo, Egypt
3. Department of Surgery and Radiology, Faculty of Veterinary Medicine, Cairo University, Cairo, Egypt
4. Department of Medical Biochemistry and Molecular Biology, Faculty of Medicine, Cairo University, Cairo, Egypt
5. Department of Hormones, Medical Research and Clinical Studies Institute, National Research Centre, Cairo, Egypt