title: CHRONIC BRONCHITIS AND EMPHYSEMA.
mesh_terms: D001991:Bronchitis; D029481:Bronchitis, Chronic; D002965:Classification; D004646:Emphysema; D006801:Humans; D009093:Mucus; D010336:Pathology; D011009:Pneumoconiosis; D011656:Pulmonary Emphysema; D013183:Sputum
keywords: BRONCHITIS; CLASSIFICATION; MUCUS; PATHOLOGY; PNEUMOCONIOSIS; PULMONARY EMPHYSEMA; REVIEW; SPUTUM