1. Department of Public Health and Hygiene, University of Buea, Buea, Cameroon; Universal Health Coverage Cluster, World Health Organization, Windhoek, Namibia
2. Department of Nursing, University of Buea, Buea, Cameroon
3. Department of Medical Laboratory Science, University of Buea, Buea, Cameroon
4. Department of Public Health and Hygiene, University of Buea, Buea, Cameroon
5. School of Public Health, University of Minnesota, Minneapolis, United States of America