No abstract available
Publication types
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Comparative Study
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English Abstract
MeSH terms
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Aged
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Antibodies, Viral / analysis
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Bronchitis / immunology*
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Bronchitis / physiopathology
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Chronic Disease
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Humans
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Immunoglobulins / analysis
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Influenza A virus / immunology
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Influenza B virus / immunology
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Male
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Middle Aged
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Respiratory System / immunology*
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Respiratory System / physiopathology
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Silicosis / complications*
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Silicosis / immunology
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Silicosis / physiopathology
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Sputum / immunology
Substances
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Antibodies, Viral
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Immunoglobulins