title: Effect of mucolytic and expectorant drugs on tracheobronchial clearance in chronic bronchitis.
mesh_terms: D001692:Biological Transport; D001980:Bronchi / Q000187:drug effects* / Q000502:physiology; D001991:Bronchitis / Q000188:drug therapy*; D002908:Chronic Disease; D005100:Expectorants / Q000494:pharmacology / Q000627:therapeutic use*; D006801:Humans; D008176:Lung Volume Measurements; D014132:Trachea / Q000187:drug effects* / Q000502:physiology
chemical_list: D005100:Expectorants