Biological and Genetic Mechanisms of COPD Encyclopedia MDPI Chronic Bronchitis: A Review Journal of the COPD Foundation Understanding chronic bronchitis and living life with COPD GoHealth Urgent Care COPD is a progressive, largely irreversible airflow limitation characterized by chronic cough, sputum production, and dyspneamost commonly due to smoking. Spirometry (FEV FVC < 0.7) confirms diagnosis; smoking cessation is the most effective COPD is mainly associated with cigarette biomass smoke. Download Scientific Diagram
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