1. Department of Surgery, Section of Trauma Surgery, Hamad General Hospital, P.O. Box 3050, Doha, Qatar
2. Department of Emergency, Hamad Medical Corporation, P.O. Box 3050, Doha, Qatar
3. Clinical Research, Section of Trauma Surgery, Hamad General Hospital, Doha, Qatar
4. Clinical Medicine, Weill Cornell Medical School, P.O. Box 24144, Doha, Qatar
5. Internal Medicine, Ahmed Maher Teaching Hospital, Cairo, Egypt