Hasan S. Mahmoud1, Ali AS. Ghweil1, Ghada S. Osman2, Shamardan Ezz-Eldin S. Bazeed1, Mohamed M. Helal1
1Department of Tropical medicine and Gastroenterology, Qena Faculty of Medicine, South Valley University, 2Department of Pathology, Qena Faculty of Medicine, South Valley University, Egypt.