No abstract available
MeSH terms
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Adolescent
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Canada
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Child
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Child, Preschool
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Female
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Hospitalization
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Humans
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Indians, North American*
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Infant
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Lung Diseases / epidemiology*
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Lung Diseases / immunology
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Male
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Pneumonia / epidemiology
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Prospective Studies
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Recurrence
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Respiratory Tract Infections / epidemiology*
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Respiratory Tract Infections / immunology
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Saskatchewan