title: Changes in locus of control in heroin addicts.
mesh_terms: D006556:Heroin Dependence / Q000628:therapy*; D006801:Humans; D007389:Internal-External Control; D008297:Male; D008691:Methadone / Q000627:therapeutic use; D010551:Personality; D011581:Psychological Tests; D012114:Residential Treatment
chemical_list: D008691:Methadone