No abstract available
MeSH terms
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Adolescent
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Child
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Child, Preschool
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Female
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Heart Transplantation / immunology*
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Humans
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Immunosuppression Therapy
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Incidence
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Infant
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Influenza A Virus, H1N1 Subtype / immunology*
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Influenza, Human / epidemiology
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Influenza, Human / prevention & control*
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Male
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Retrospective Studies
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Risk Factors
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Spain
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Treatment Outcome
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Viral Vaccines / therapeutic use*