(Q39098926)
Statements
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Preparation for a pneumococcal vaccine trial in The Gambia: individual or community randomisation? (English)
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Greenwood BM
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Jaffar S
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Leach A
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Hall AJ
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Obaro S
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McAdam KP
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Smith PG
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1 November 1999
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18
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7-8
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633-640
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Identifiers
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