1. Maxillofacial Unit, Ahmadu Bello University Teaching Hospital, Zaria, Kaduna State, Nigeria
2. Anaesthesia Department, Ahmadu Bello University Teaching Hospital, Zaria, Kaduna State, Nigeria
3. Chaha Eye Hospital, 42B Jabi Road, Kaduna, Kaduna State, Nigeria
4. Department of Histopathology, Ahmadu Bello University Teaching Hospital, Zaria, Kaduna State, Nigeria