title: The evaluation of mucolytic drugs in chronic bronchitis.
mesh_terms: D001991:Bronchitis / Q000188:drug therapy* / Q000503:physiopathology; D005100:Expectorants / Q000627:therapeutic use; D006801:Humans; D009093:Mucus / Q000187:drug effects*; D012129:Respiratory Function Tests; D013183:Sputum / Q000187:drug effects; D014783:Viscosity
chemical_list: D005100:Expectorants