1. Department of Neurology, Faculty of Medicine, Al-Azhar University, Cairo, Egypt
2. Department of Internal Medicine, Faculty of Medicine, Al-Azhar University, Cairo, Egypt
3. Faculty of Medicine, Al-Azhar University, Damietta, Egypt
4. Department of Clinical Pathology, Faculty of Medicine, Al-Azhar University, Cairo, Egypt
5. Department of Radiology, Faculty of Medicine, Al-Azhar University, Cairo, Egypt
6. Department of Community and Occupational Medicine, Faculty of Medicine, Al-Azhar University, Cairo, Egypt