Consistency of patterns of drug use.
D000328:Adult; D000661:Amphetamine; D001463:Barbiturates; D004812:Epidemiologic Methods; D000431:Ethanol; D005260:Female; D006213:Hallucinogens; D003932:Heroin; D006801:Humans; D007615:Kansas; D008297:Male; D011336:Probability; D013334:Students; D019966:Substance-Related Disorders / Q000453:epidemiology*; D014149:Tranquilizing Agents; D014495:Universities
D001463:Barbiturates; D006213:Hallucinogens; D014149:Tranquilizing Agents; D000431:Ethanol; D003932:Heroin; D000661:Amphetamine