title: Morphine and 6-monoacetylmorphine in hair of heroin users: use of invalid extraction procedures generates erroneous conclusions.
authors.forename: Michael
authors.initials: M
authors.lastname: Schaffer
authors.forename: Virginia
authors.initials: V
authors.lastname: Hill
authors.forename: Thomas
authors.initials: T
authors.lastname: Cairns
mesh_terms: D003951:Diagnostic Errors; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D006197:Hair / Q000737:chemistry / Q000378:metabolism*; D006556:Heroin Dependence / Q000175:diagnosis* / Q000378:metabolism; D006801:Humans; D009020:Morphine / Q000032:analysis / Q000378:metabolism*; D009022:Morphine Derivatives / Q000032:analysis / Q000378:metabolism*; D013048:Specimen Handling / Q000379:methods*; D015813:Substance Abuse Detection / Q000379:methods*
chemical_list: D009022:Morphine Derivatives; D009020:Morphine; C026979:6-O-monoacetylmorphine