Affiliation: | 1.Department of Biological, Environmental and Occupational Health Science, School of Public Health, University of Ghana, P. O. Box LG 13 Legon, Accra, Ghana;2.Department of Health Policy Planning & Management, School of Public Health, P. O. Box LG13 Legon, Accra, Ghana and School of Public Health, University of Ghana, P. O. Box LG13, Accra, Ghana |