1. Departments of Physiology, College of Medicine, King Khalid University, Abha, Saudi Arabia
2. Physiology Department, Kasr al-Aini Faculty of Medicine, Cairo University, Cairo, Egypt
3. Clinical Biochemistry, College of Medicine, King Khalid University, Abha, Saudi Arabia
4. Department of Medical Biochemistry, Faculty of Medicine, Mansoura University, Mansoura, Egypt
5. Pathology Department, College of Medicine, King Khalid University, Abha, Saudi Arabia
6. Anatomy Department, College of Medicine, King Khalid University, Abha, Saudi Arabia
7. Department of Anatomy, kasr al-Aini Faculty of Medicine, Cairo University, Cairo, Egypt