title: Letter: Carbidopa.
mesh_terms: D002230:Carbidopa / Q000627:therapeutic use*; D006801:Humans; D006834:Hydrazines / Q000627:therapeutic use*; D010300:Parkinson Disease / Q000188:drug therapy*; D014481:United States
chemical_list: D006834:Hydrazines; D002230:Carbidopa