No abstract available
MeSH terms
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Adolescent
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Adult
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Aged
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Bacterial Infections / epidemiology
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Bacterial Infections / microbiology
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Child
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Female
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Humans
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Male
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Middle Aged
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Pneumonia / epidemiology
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Pneumonia / microbiology*
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Pneumonia, Mycoplasma / epidemiology
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Pneumonia, Viral / epidemiology
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Prospective Studies
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Spain