No abstract available
Publication types
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Letter
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Research Support, Non-U.S. Gov't
MeSH terms
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Adult
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Humans
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Influenza A Virus, H1N1 Subtype*
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Influenza Vaccines / administration & dosage*
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Influenza Vaccines / adverse effects*
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Influenza, Human / prevention & control*
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Middle Aged
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Multiple Sclerosis / epidemiology*
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Risk Factors