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Ndako, James A. and Nwankiti, Obinna O. and Georgebest, ON Echeonwu and Surajudeen, A Junaid and Onyeka, Anaele and Tiri, J Anthony (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 2219-3170