1. Department of General Surgery, University of Benin Teaching Hospital, Benin City, Nigeria

2. Department of General Surgery, University of Ibadan College of Medicine, Ibadan, Nigeria

3. Department of General Surgery, University of Calabar Teaching Hospital, Calabar, Nigeria

4. Department of Surgery, Southport and Formby District Hospital, Southport Merseyside, United Kingdom

5. Department of General Surgery, Lagos State University Faculty of Medicine, Lagos, Nigeria

6. Department of Surgery, Royal Cornwall Hospital (Treliske), Truro, Cornwall, United Kingdom

7. Department of Surgery, St. Barnabas Hospital SBH Health System, Bronx, New York, United States

8. Deparment of Surgery, Petre Shotadze Tbilisi Medical Academy, Tbilisi, Georgia