No abstract available
MeSH terms
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Adult
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Age Distribution
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Air Pollutants, Occupational / adverse effects
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Bulgaria / epidemiology
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Female
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Humans
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Incidence
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Male
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Middle Aged
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Occupational Exposure / adverse effects*
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Plethysmography
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Prognosis
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Respiratory Function Tests
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Respiratory Tract Diseases / diagnosis*
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Respiratory Tract Diseases / epidemiology
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Respiratory Tract Diseases / etiology*
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Risk Assessment
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Severity of Illness Index
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Sex Distribution
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Spirometry
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Tobacco Industry*
Substances
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Air Pollutants, Occupational