title: A tale of two drugs: urea and chymopapain. The 1982 Percival Bailey Oration.
mesh_terms: D002917:Chymopapain / Q000008:administration & dosage / Q000266:history / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D010450:Endopeptidases / Q000627:therapeutic use*; D006666:History of Medicine; D006801:Humans; D007405:Intervertebral Disc Displacement / Q000188:drug therapy; D007427:Intracranial Pressure / Q000187:drug effects; D009493:Neurosurgery / Q000266:history; D014508:Urea / Q000266:history / Q000494:pharmacology / Q000627:therapeutic use*
chemical_list: D014508:Urea; D010450:Endopeptidases; D002917:Chymopapain