title: Long-term oral acetylcysteine in chronic bronchitis. a double-blind controlled study.
mesh_terms: D000111:Acetylcysteine / Q000009:adverse effects / Q000627:therapeutic use*; D000284:Administration, Oral; D000368:Aged; D001991:Bronchitis / Q000188:drug therapy* / Q000503:physiopathology; D002908:Chronic Disease; D002986:Clinical Trials as Topic; D003371:Cough / Q000188:drug therapy; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013183:Sputum / Q000187:drug effects
chemical_list: D000111:Acetylcysteine