title: [Clinical study on the comprehensive approach to acute exacerbations in chronic obstructive pulmonary disease (COPD)].
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000150:complications* / Q000628:therapy; D008297:Male; D008875:Middle Aged