1. Acute Care Surgery Section, Hamad General Hospital, Doha, Qatar

2. Department of Surgery, College of Medicine, Qatar University, Doha, Qatar

3. Department of Surgery, Weill Cornell Medical College, Doha, Qatar

4. Department of General Surgery, Al-Jalla Teaching Hospital, Faculty of Medicine, Benghazi University, Benghazi, Libya

5. Department of General Surgery, Faculty of Medicine, Ain Shams University, Cairo, Egypt