1. Department of Internal Medicine, Faculty of Medicine, Ain Shams University, Cairo, Egypt
2. Department of Family Medicine, Faculty of Medicine, Ain Shams University, Cairo, Egypt
3. Department of Clinical Pathology, Faculty of Medicine, Ain Shams University, Cairo, Egypt
4. Department of Radiology, Faculty of Medicine, Ain Shams University, Cairo, Egypt
5. Department of Anesthesia and Intensive Care, Faculty of Medicine, Ain Shams University, Cairo, Egypt