title: Locus of control among opiate addicts.
mesh_terms: D005260:Female; D006801:Humans; D007389:Internal-External Control; D008297:Male; D009892:Opium; D011336:Probability; D011581:Psychological Tests; D012649:Self Concept; D019966:Substance-Related Disorders
chemical_list: D009892:Opium