The epidemiology of drug abuse: current issues. Trends and projections.
D000293:Adolescent; D000428:Alcohol Drinking; D002170:Canada; D004219:District of Columbia; D004812:Epidemiologic Methods; D006556:Heroin Dependence / Q000453:epidemiology; D006801:Humans; D007484:Iowa; D012306:Risk; D019966:Substance-Related Disorders / Q000453:epidemiology*