title: Does theophylline improve dyspnea in nonreversible COPD?
authors.forename: B M
authors.initials: BM
authors.lastname: Cohen
mesh_terms: D000328:Adult; D000368:Aged; D004417:Dyspnea / Q000188:drug therapy* / Q000209:etiology; D005260:Female; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000150:complications*; D008297:Male; D008875:Middle Aged; D013806:Theophylline / Q000627:therapeutic use*
chemical_list: D013806:Theophylline