title: Drug testing and the toilet bowl blues.
authors.forename: H W
authors.initials: HW
authors.lastname: Clark
authors.forename: K L
authors.initials: KL
authors.lastname: Sees
mesh_terms: D005189:False Positive Reactions; D006801:Humans; D008751:Methylene Blue / Q000494:pharmacology; D015813:Substance Abuse Detection; D019966:Substance-Related Disorders / Q000652:urine*; D014881:Water Supply
chemical_list: D008751:Methylene Blue