No abstract available
MeSH terms
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Diagnosis, Differential
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Dyspnea / diagnosis*
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Dyspnea / etiology
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Dyspnea / therapy*
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Humans
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Male
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Middle Aged
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Physical Exertion / physiology*
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Pulmonary Disease, Chronic Obstructive / complications*
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Pulmonary Disease, Chronic Obstructive / genetics*
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Treatment Outcome
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United States
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alpha 1-Antitrypsin Deficiency / diagnosis*
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alpha 1-Antitrypsin Deficiency / genetics
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alpha 1-Antitrypsin Deficiency / therapy*