1. Department of Oral and Maxillofacial Surgery, College of Medicine, University of Ibadan/UCH, Ibadan, Nigeria
2. Oral and Maxillofacial Surgery Unit, Federal Medical Centre Abeokuta, Abeokuta, Ogun State, Nigeria
3. Department of Community Health, College of Health Sciences, Obafemi Awolowo University, Ile-Ife, Nigeria