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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Antibodies, Viral / analysis*
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Data Interpretation, Statistical
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Humans
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Immunologic Factors / adverse effects*
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Incidence
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JC Virus
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Leukoencephalopathy, Progressive Multifocal / chemically induced*
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Leukoencephalopathy, Progressive Multifocal / epidemiology*
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Natalizumab / adverse effects*
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Risk Factors
Substances
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Antibodies, Viral
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Immunologic Factors
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Natalizumab