1. Community and Occupational Medicine Department, Medical Education Unit, Faculty of Medicine, Al-Azhar University, Cairo, Egypt
2. Pharmacology Department, Medical Education Unit, Faculty of Medicine, Al-Azhar University, Cairo, Egypt
3. Forensic Medicine and Clinical Toxicology Department, Faculty of Medicine, Al-Azhar University, Cairo, Egypt
4. Anatomy and Embryology Department, Faculty of Medicine, Al-Azhar University, Cairo, Egypt