1. Department of Medical Microbiology and Immunology, Damietta Faculty of Medicine, Al-Azhar University, Egypt
2. Department of Medical Microbiology and Immunology, Faculty of Medicine, Mansoura University, Egypt
3. Department of Cardiology, Faculty of Medicine, Mansoura University, Egypt
4. Department of Thoracic Medicine, Faculty of Medicine, Mansoura University, Egypt
5. Department of Internal Medicine, Faculty of Medicine, Mansoura University, Egypt