Research on drug use goes down the toilet.
Roger
R
Collier
D005060:Europe / Q000453:epidemiology; D006801:Humans; D013287:Illicit Drugs / Q000032:analysis; D009922:Oregon / Q000453:epidemiology; D012722:Sewage / Q000032:analysis; D019966:Substance-Related Disorders / Q000453:epidemiology*; D014865:Waste Disposal, Fluid / Q000706:statistics & numerical data
D013287:Illicit Drugs; D012722:Sewage