No abstract available
Publication types
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Letter
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Research Support, Non-U.S. Gov't
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Research Support, N.I.H., Extramural
MeSH terms
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Aged
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Cause of Death
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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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Mucus* / metabolism
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Pulmonary Disease, Chronic Obstructive* / mortality
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Pulmonary Disease, Chronic Obstructive* / physiopathology