No abstract available
MeSH terms
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Adult
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Aged
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Agricultural Workers' Diseases / immunology*
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Agricultural Workers' Diseases / physiopathology
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Animal Husbandry
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Animals
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Humans
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Immunoglobulin G / analysis*
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Middle Aged
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Respiratory Function Tests
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Respiratory Tract Diseases / immunology*
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Respiratory Tract Diseases / physiopathology
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Surveys and Questionnaires
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Swine / immunology*