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Ndako, James A. and Nwankiti, O. O. and Echeonwu, G. O. N. and Junaid, S. A. and Anaele, O. and Anthony, T. J. (2011) Studies on Prevalence and Risk Factors for Hepatitis B Surface Antigen among Secondary School Students in North-central, Nigeria. Sierra Leone Journal of Biomedical Research, 3 (3). pp. 163-168. ISSN 2076-6270; 2219-3170