title: On the effectiveness of treatment for drug abuse: evidence from the DARP research programme in the United States.
mesh_terms: D000293:Adolescent; D000328:Adult; D000553:Ambulatory Care; D005069:Evaluation Studies as Topic; D005500:Follow-Up Studies; D006801:Humans; D008691:Methadone / Q000627:therapeutic use; D010043:Outcome and Process Assessment, Health Care; D012107:Research Design; D019966:Substance-Related Disorders / Q000534:rehabilitation*; D013808:Therapeutic Community; D014481:United States
chemical_list: D008691:Methadone