1. Department of Oral and Maxillofacial Surgery, Obafemi Awolowo University Teaching Hospitals Complex, Ile-Ife, Nigeria
2. Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Obafemi Awolowo University, Ile-Ife, Nigeria
3. Institute of Public Health, Obafemi Awolowo University, Ile-Ife, Nigeria
4. Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Lagos State University College of Medicine, Ikeja, Nigeria