1. Oral and Maxillofacial Surgery Department, University of Maiduguri Teaching Hospital, Maiduguri, Borno State, Nigeria
2. Anaesthesia Department, University of Maiduguri Teaching Hospital, Maiduguri, Borno State, Nigeria
3. Plastic Surgery Unit, Department of Surgery, University of Maiduguri, Maiduguri, Borno State, Nigeria
4. Dental Department UDUTH Sokoto, Usmanu Danfodiyo University Teaching Hospital Sokoto, Sokoto, Nigeria
5. Department of Surgery, University of Maiduguri & UMTH, Maiduguri, Borno State, Nigeria