COPD, Asthma and the Environment – U.S. News & World Report


U.S. News & World Report

COPD, Asthma and the Environment
U.S. News & World Report
While smoking remains the major cause of COPD – the combined term for emphysema, bronchitis and some forms of asthma – about one-quarter of people affected are nonsmokers. Some have a genetic form of COPD. And for others, environmental factors …

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