Objective assessment of antitussive agents in patients with chronic cough.
D000368:Aged; D000996:Antitussive Agents / Q000627:therapeutic use*; D001991:Bronchitis / Q000150:complications; D002986:Clinical Trials as Topic; D003061:Codeine / Q000627:therapeutic use*; D003371:Cough / Q000188:drug therapy*; D005069:Evaluation Studies as Topic; D006801:Humans; D008297:Male; D008875:Middle Aged; D010919:Placebos; D011656:Pulmonary Emphysema / Q000150:complications; D013637:Tape Recording
D000996:Antitussive Agents; D010919:Placebos; D003061:Codeine