The Nation - News from April 26, 1985
Laboratories that test urine for commonly abused drugs often produce unreliable results, federal researchers reported in the Journal of the American Medical Assn. Ninety percent of the labs evaluated for the quality of urine testing for drugs had unacceptable error rates for barbiturates, amphetamines, cocaine and morphine, according to Hugh Hansen of the Centers for Disease Control in Atlanta. The percentage of correct analysis for each drug ranged from 0 to 100.
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