No abstract available
MeSH terms
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Adolescent
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Adult
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Age Factors
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Aged
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Airway Obstruction / diagnosis*
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Airway Obstruction / etiology
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Female
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Humans
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Male
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Middle Aged
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Nitrogen
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Pulmonary Alveoli*
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Pulmonary Emphysema / complications*
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Respiratory Function Tests*
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Sex Factors
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Smoking / complications*