1. Department of Medical Microbiology and Immunology, Faculty of Medicine, Sohag University, Sohag, Egypt.
2. Department of Tropical Medicine and Gastroenterology, Faculty of Medicine, Sohag University, Sohag, Egypt.
3. Department of Medical Biochemistry, Faculty of Medicine, Sohag University, Sohag, Egypt.
4. Department of Physiology, Faculty of Medicine, Sohag University, Sohag, Egypt.
5. Department of Internal Medicine, Faculty of Medicine, Sohag University, Sohag, Egypt.