Editorial: British medical journal.
D001980:Bronchi / Q000378:metabolism*; D001991:Bronchitis / Q000188:drug therapy; D005100:Expectorants / Q000494:pharmacology / Q000627:therapeutic use; D006801:Humans; D013183:Sputum / Q000187:drug effects / Q000378:metabolism*; D014783:Viscosity
D005100:Expectorants