1. Department of Neurology, State University of New York Upstate Medical University Syracuse New York 13210 USA
2. Department of Pathology, State University of New York Upstate Medical University Syracuse New York 13210 USA
3. Chest Department, Faculty of Medicine Assiut University Assiut Egypt
4. Department of Public Health, Occupational and Environmental Medicine, Faculty of Medicine Suez Canal University Ismailia Egypt
5. Department of Public Health and Community Medicine Faculty of Medicine Assiut University Assiut Egypt
6. Department of Tropical Medicine and Gastroenterology, Faculty of Medicine Assiut University Assiut Egypt
7. New York State Department of Health Albany New York USA
8. Department of Family Medicine Suez Canal University Ismailia Egypt
9. Department of Cardiovascular Perfusion, State University of New York Upstate Medical University Syracuse New York 13210 USA