title: The epidemiology of drug abuse: current issues. Problems related to survey sampling.
mesh_terms: D000328:Adult; D005260:Female; D006556:Heroin Dependence / Q000453:epidemiology; D006801:Humans; D008297:Male; D009657:North Carolina; D012494:Sampling Studies; D019966:Substance-Related Disorders / Q000453:epidemiology*