1. Internal Medicine Department, Faculty of Medicine, King Abdulaziz, University, Saudi Arabia
2. Pharmacology Department, Faculty of Medicine, King Abdulaziz University, Saudi Arabia
3. Pharmacology Department, Faculty of Medicine, Suez Canal University, Egypt
4. Anatomy Department, Faculty of Medicine, King Abdulaziz, University, Saudi Arabia
5. Histology Department, Faculty of Medicine, Cairo University, Egypt
6. Pharmacology Department, Faculty of Medicine, Cairo University, Egypt