1. Department of Forensic Medicine and Clinical Toxicology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
2. Department of Anesthesiology and Intensive Care, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
3. Department of Community, Occupational and Environmental Medicine, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
4. Department of Anesthesiology and Intensive Care, Faculty of Medicine, Ain Shams university, Cairo, Egypt