No abstract available
MeSH terms
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Aged
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Aged, 80 and over
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Anti-Bacterial Agents / pharmacology*
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Drug Resistance, Bacterial*
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England
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Erythromycin / pharmacology*
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Humans
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Infant
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Pneumococcal Infections / microbiology*
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Prevalence
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Streptococcus pneumoniae / drug effects*
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Streptococcus pneumoniae / isolation & purification
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Wales
Substances
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Anti-Bacterial Agents
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Erythromycin