1. Department of Dental and Maxillofacial Surgery, Usmanu Danfodiyo University Teaching Hospital, Sokoto, Sokoto State, Nigeria
2. Department of Dental Surgery, Federal Medical Centre Gusau, Gusau, Nigeria
3. Department of Oral and Maxillofacial Surgery, Aminu Kano Teaching Hospital, Kano, Nigeria
4. Department of Restorative Dentistry, Usmanu Danfodiyo University Teaching Hospital, Sokoto, Sokoto State, Nigeria