Preparation for a pneumococcal vaccine trial in The Gambia: individual or community randomisation?

Author: Jaffar S.   Leach A.   Hall A.J.   Obaro S.   McAdam K.P.W.J.   Smith P.G.   Greenwood B.M.  

Publisher: Elsevier

ISSN: 0264-410X

Source: Vaccine, Vol.18, Iss.7, 1999-11, pp. : 633-640

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