1. Department of Medical Microbiology and Immunology, Faculty of Medicine, Fayoum University, Fayoum, Egypt
2. Department of Clinical and Chemical Pathology, Faculty of Medicine, Fayoum University, Fayoum, Egypt
3. Department of Radiology, Faculty of Medicine, Fayoum University, Fayoum, Egypt
4. Department of Public Health and Community Medicine, Faculty of Medicine, Fayoum University, Fayoum, Egypt
5. Department of Critical Care Medicine, Faculty of Medicine, Fayoum University, Fayoum, Egypt
6. Department of Chest Diseases and Tuberculosis, Faculty of Medicine, Fayoum University, Fayoum, Egypt