title: Extraversion--introversion: the personality characteristics of drug abusers.
mesh_terms: D000293:Adolescent; D000328:Adult; D005120:Extraversion, Psychological; D006556:Heroin Dependence; D006801:Humans; D007439:Introversion, Psychological; D007602:Jungian Theory; D008297:Male; D010555:Personality Inventory