title: Negative direct Coombs' tests in narcotic addicts receiving maintenance doses of methadone.
mesh_terms: D000888:Antibodies, Anti-Idiotypic / Q000032:analysis*; D002849:Chromatography, Gas; D002855:Chromatography, Thin Layer; D003298:Coombs Test; D005470:Fluorometry; D006801:Humans; D008691:Methadone / Q000494:pharmacology* / Q000627:therapeutic use / Q000652:urine; D009020:Morphine / Q000652:urine; D011803:Quinine / Q000652:urine; D019966:Substance-Related Disorders / Q000276:immunology*
chemical_list: D000888:Antibodies, Anti-Idiotypic; D009020:Morphine; D011803:Quinine; D008691:Methadone