title: Comparison of the EMIT (enzyme multiplied immunoassay technique) opiate assay and a gas-chromatographic--mass-spectrometric determination of morphine and codeine in urine.
mesh_terms: D001322:Autoanalysis; D003061:Codeine / Q000652:urine*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D006801:Humans; D007118:Immunoassay / Q000379:methods; D009020:Morphine / Q000652:urine*
chemical_list: D009020:Morphine; D003061:Codeine