title: Distribution unevenness and dyspnea in patients with chronic obstructive lung disease.
mesh_terms: D000328:Adult; D000368:Aged; D001991:Bronchitis / Q000150:complications; D004417:Dyspnea / Q000209:etiology*; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000150:complications / Q000503:physiopathology*; D008875:Middle Aged; D011650:Pulmonary Alveoli / Q000503:physiopathology; D011656:Pulmonary Emphysema / Q000150:complications / Q000503:physiopathology; D012129:Respiratory Function Tests; D013147:Spirometry