Proficiency testing of drug analysis laboratories.
McCoy
H G
HG
D005189:False Positive Reactions; D006801:Humans; D007753:Laboratories / Q000592:standards*; D009294:Narcotics / Q000032:analysis; D015813:Substance Abuse Detection / Q000592:standards*; D014481:United States; D014486:United States Food and Drug Administration; D014482:United States Substance Abuse and Mental Health Services Administration
D009294:Narcotics