No abstract available
Publication types
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Comment
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Comparative Study
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Letter
MeSH terms
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Cross-Cultural Comparison
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Cross-Sectional Studies
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Europe
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Humans
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Periodicals as Topic / statistics & numerical data*
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Pulmonary Medicine / statistics & numerical data*
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Research / statistics & numerical data*
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Respiration*
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Respiratory Tract Diseases / epidemiology
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United States