title: A comparative trial of Atrovent and Ventolin in chronic bronchitis.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000420:Albuterol / Q000627:therapeutic use*; D001286:Atropine Derivatives / Q000627:therapeutic use*; D001991:Bronchitis / Q000188:drug therapy* / Q000503:physiopathology; D002908:Chronic Disease; D005260:Female; D006801:Humans; D009241:Ipratropium / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D010366:Peak Expiratory Flow Rate
chemical_list: D001286:Atropine Derivatives; D009241:Ipratropium; D000420:Albuterol