title: False positives and negatives in routine testing for drugs of abuse.
authors.forename: L J
authors.initials: LJ
authors.lastname: Notarianni
authors.forename: D
authors.initials: D
authors.lastname: Belk
authors.forename: A J
authors.initials: AJ
authors.lastname: Collins
mesh_terms: D004739:England; D005188:False Negative Reactions; D005189:False Positive Reactions; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D013287:Illicit Drugs / Q000652:urine; D011329:Prisoners; D015813:Substance Abuse Detection / Q000379:methods*; D014852:Wales
chemical_list: D013287:Illicit Drugs