1. Department of Child Dental Health, Faculty of Dentistry, University of Nigeria, Ituku-Ozalla, Enugu, Nigeria
2. Department of Restorative Dentistry, University of Nigeria Teaching Hospital, Ituku-Ozalla, Enugu, Nigeria
3. Department of Child Dental Health, Faculty of Dentistry, University of Port Harcourt, College of Health Sciences, Port Harcourt, River State, Nigeria