1. Al Razi Hospital Vascular Surgery Department, , Aleppo, Syria
2. University of Aleppo Faculty of Medicine, , Aleppo 15310, Syria
3. Aleppo University Hospital General Surgery Department, , Aleppo 15310, Syria
4. Tishreen Hospital General Surgery Department, , Damascus, Syria
5. Tishreen Hospital Pathology Department, , Damascus, Syria
6. Abd Al Wahab Agha Hospital General Surgery Department, , Aleppo, Syria