1 School of Public Health, College of Health Sciences, University of Port Harcourt, Port Harcourt, Rivers State, Nigeria/ Department of Preventive Dentistry, Faculty of Dentistry, College of Health Sciences, University of Port Harcourt, Rivers State, Nigeria.
2 Department of Epidemiology, University of Calabar, Cross River State, Port Harcourt, Nigeria.
3 Department of Family Medicine, Rivers State University, Port Harcourt, Rivers State, Nigeria.
4 Department of Medical Microbiology and Parasitology, Faculty of Basic Clinical Science, College of Health Sciences, Faculty of Basic Clinical Science, College of Health Sciences, University of Port Harcourt, Rivers State, Nigeria.
5 Department of Child Dental Health, Faculty of Dentistry, College of Health Sciences, University of Port Harcourt, Rivers State, Nigeria.
6 School of Public Health, College of Health Sciences, University of Port Harcourt, Port Harcourt, Rivers State, Nigeria.
7 Department of Public Health, Ministry of Health, Port Harcourt, Rivers State, Nigeria.