1. Department of Surgery, Al-Mouwasat University Hospital, Damascus University, Damascus, (The) Syrian Arab Republic
2. Department of Surgery, Al Assad University Hospital, Damascus University, Damascus, (The) Syrian Arab Republic
3. Department of Surgery, Faculty of Medicine, Damascus University, Damascus, (The) Syrian Arab Republic
4. Department of Pathology, Al-Mouwasat University Hospital, Damascus University, Damascus, (The) Syrian Arab Republic.
5. Department of Pathology, Faculty of Medicine, Damascus University, Damascus, (The) Syrian Arab Republic