title: A combined high-performance liquid chromatography and immunoassay method for the analysis of morphine, codeine and their metabolites in biological fluids.
mesh_terms: D001826:Body Fluids / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D003061:Codeine / Q000031:analogs & derivatives* / Q000032:analysis*; D005554:Forensic Medicine; D006801:Humans; D009020:Morphine / Q000032:analysis*; D009022:Morphine Derivatives; D011863:Radioimmunoassay / Q000379:methods*
chemical_list: D009022:Morphine Derivatives; D009020:Morphine; D003061:Codeine