title: Chymopapain: a case study in federal drug regulation.
mesh_terms: D002917:Chymopapain / Q000008:administration & dosage / Q000266:history / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D010450:Endopeptidases / Q000627:therapeutic use*; D049673:History, 20th Century; D006801:Humans; D007267:Injections; D007405:Intervertebral Disc Displacement / Q000188:drug therapy*; D007880:Legislation, Drug; D010919:Placebos; D014481:United States; D014486:United States Food and Drug Administration
chemical_list: D010919:Placebos; D010450:Endopeptidases; D002917:Chymopapain