A pattern of drug use in North Dakota.
D000661:Amphetamine; D001463:Barbiturates; D004812:Epidemiologic Methods; D006213:Hallucinogens; D003932:Heroin; D006801:Humans; D008297:Male; D009658:North Dakota; D009892:Opium; D013334:Students; D019966:Substance-Related Disorders / Q000453:epidemiology*; D014495:Universities
D001463:Barbiturates; D006213:Hallucinogens; D003932:Heroin; D009892:Opium; D000661:Amphetamine