1. Department of Child Dental Health, Dental Centre, University of Port Harcourt Teaching Hospital, Port Harcourt 500001, Nigeria
2. Department of Child Dental Health, School of Dentistry, College of Medicine, University of Lagos, Lagos 101241, Nigeria
3. Department of Child Dental Health, Faculty of Dentistry, College of Health Sciences, University of Port Harcourt, Port Harcourt 500001, Nigeria