title: Numerous studies show urine drug testing a critical tool in treatment of chronic noncancer pain.
authors.forename: John W
authors.initials: JW
authors.lastname: Gilbert
mesh_terms: D000701:Analgesics, Opioid / Q000652:urine*; D002853:Chromatography, Liquid; D005188:False Negative Reactions; D005189:False Positive Reactions; D006801:Humans; D007118:Immunoassay; D013058:Mass Spectrometry; D010146:Pain / Q000188:drug therapy*
chemical_list: D000701:Analgesics, Opioid