No abstract available
MeSH terms
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Adult
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Aerobiosis
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Aged
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Anaerobiosis
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Bacteria / isolation & purification*
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Cross Infection / microbiology*
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Humans
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Middle Aged
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Pleural Effusion / microbiology
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Pneumonia, Aspiration / microbiology*
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Prospective Studies
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Sputum / microbiology