No abstract available
MeSH terms
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Aged
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Bronchitis / physiopathology
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Chronic Disease
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Electrocardiography
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Female
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Humans
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Lung Diseases, Obstructive / physiopathology*
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Male
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Methods
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Middle Aged
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Pulmonary Emphysema / physiopathology
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Respiration*
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Spirometry
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Statistics as Topic
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Vital Capacity