1. Department of Surgery, Jos University Teaching Hospital, Jos, Plateau, Nigeria
2. Department of Surgery, Ahmadu Bello University Teaching Hospital, Zaria, Kaduna, Nigeria
3. Department of Paediatrics, Wuse District Hospital, Abuja, Nigeria
4. Department of Pediatrics, National Hospital Abuja, Abuja, Nigeria
5. Office of the Provost, Saidu Namaska College of Health Science and Technology, Kontagora, Niger, Nigeria
6. Department of Community Medicine, Jos University Teaching Hospital, Jos, Plateau, Nigeria