No abstract available
Keywords:
COPD.
MeSH terms
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Dust
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Humans
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Occupational Diseases / etiology*
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Occupational Diseases / prevention & control
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Occupational Exposure / adverse effects*
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Occupations
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Pulmonary Disease, Chronic Obstructive / etiology*
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Pulmonary Disease, Chronic Obstructive / prevention & control
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Risk Factors
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Smoking / adverse effects