1. Department of Surgery School of Medicine and Dentistry Kwame Nkrumah University of Science and Technology Kumasi Ghana
2. University Hospital Kwame Nkrumah University of Science and Technology Kumasi Ghana
3. Department of Surgery Eastern Regional Hospital Koforidua Ghana
4. Nsawam Government Hospital Nsawam Ghana
5. Holy Family Hospital Techiman Ghana
6. Sunyani Regional Hospital Sunyani Ghana
7. Department of Surgery University of Washington Seattle Washington USA