1. Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Obafemi Awolowo University, Ile-Ife, Nigeria.
2. Department of Surgery, Ahmadu Bello University, Zaria, Kaduna State, Nigeria.
3. Department of Surgery, Plastic Surgery Unit, Obafemi Awolowo University, Ile-Ife, Nigeria.
4. Department of Oral and Maxillofacial Surgery, School of Dentistry, University of Benin, Benin City, Nigeria.
5. Plastic Surgery Department, National Orthopedic Hospital, Enugu, Nigeria.