1. Departments of Pathology, College of Medicine, King Khalid University, Abha, Saudi Arabia
2. Departments of Anatomy, College of Medicine, King Khalid University, Abha, Saudi Arabia
3. Department of Histology, Faculty of Medicine, Zagazig University, Zagazig, Egypt
4. Departments of Medical HistologyKasr Al-Aini Faculty of Medicine, Cairo University, Giza, Egypt
5. Departments of Medical Pharmacology, Kasr Al-Aini Faculty of Medicine, Cairo University, Giza, Egypt
6. Departments of Microbiology, College of Applied Medical Sciences, Mahail Campus, King Khalid University, Abha, Saudi Arabia
7. Departments of Physiology, College of Medicine, King Khalid University, Abha, Saudi Arabia
8. Physiology Department, Kasr al-Aini Faculty of Medicine, Cairo University, Cairo, Egypt