No abstract available
Publication types
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Comment
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Comparative Study
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Editorial
MeSH terms
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Biomarkers / blood
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Cross-Sectional Studies
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Dietary Supplements*
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Female
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Humans
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Male
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Prevalence
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Prognosis
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Pulmonary Disease, Chronic Obstructive / epidemiology*
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Pulmonary Disease, Chronic Obstructive / prevention & control
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Respiratory Function Tests
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Sensitivity and Specificity
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Vitamin D / administration & dosage
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Vitamin D / metabolism*