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International Journal of Epidemiology|March 17, 2004
Comparison of two cluster sampling methods for health surveys in developing countriesPaul Milligan, Alpha Njie, Steve BennettLancet (London, England)|July 12, 2005
Elimination of Haemophilus influenzae type b (Hib) disease from The Gambia after the introduction of routine immunisation with a Hib conjugate vaccine: a prospective studyRichard A Adegbola, Ousman Secka, George Lahai, et al.Pageof 1