title: The truthfulness of addict respondents in research projects.
mesh_terms: D000328:Adult; D000359:Aftercare; D003376:Counseling; D003417:Criminal Psychology; D008192:Deception; D003674:Defense Mechanisms; D004651:Employment; D006801:Humans; D008297:Male; D009294:Narcotics; D012106:Research; D019966:Substance-Related Disorders / Q000534:rehabilitation; D011795:Surveys and Questionnaires; D014705:Verbal Behavior
chemical_list: D009294:Narcotics