1. Department of Surgery, Faculty of medicine, Damascus University, Damascus, Syrian Arab Republic
2. Department of Biochemistry and Microbiology, Faculty of Pharmacy, Damascus University, Damascus, Syrian Arab Republic
3. Department of Gastroenterology and Hepatology, Faculty of medicine, Damascus University, Damascus, Syrian Arab Republic
4. Division of Reproductive Medicine, Embryology and Genetics, Faculty of Medicine, Damascus University, Damascus, Syrian Arab Republic