title: "Practical guide" to urine drug screening clarified.
authors.forename: Gary M
authors.initials: GM
authors.lastname: Reisfield
authors.forename: Roger L
authors.initials: RL
authors.lastname: Bertholf
mesh_terms: D006801:Humans; D017410:Practice Guidelines as Topic; D011237:Predictive Value of Tests; D015813:Substance Abuse Detection / Q000379:methods*; D019966:Substance-Related Disorders / Q000175:diagnosis* / Q000652:urine*; D016482:Urinalysis