1. Department of Surgery , Acute Care Surgery, , P. O. Box 3050, Doha , Qatar
2. Hamad Medical Corporation , Acute Care Surgery, , P. O. Box 3050, Doha , Qatar
3. Department of General Surgery, Ain Shams University , 11566, Cairo , Egypt
4. College of Medicine , Qatar University, P. O. Box 2713, Doha , Qatar
5. Surgical Research Section , Department of Surgery, , P. O. Box 3050, Doha , Qatar
6. Hamad Medical Corporation , Department of Surgery, , P. O. Box 3050, Doha , Qatar
7. Department of Biomedical Sciences , QU-Health, College of Health Sciences, , P. O. Box 2713, Doha , Qatar
8. Qatar University , QU-Health, College of Health Sciences, , P. O. Box 2713, Doha , Qatar