title: The social structure of a heroin copping community.
mesh_terms: D000367:Age Factors; D002641:Chicago; D003710:Demography; D005260:Female; D006127:Group Structure; D003932:Heroin; D006801:Humans; D008297:Male; D008603:Mental Health; D008691:Methadone / Q000627:therapeutic use; D009021:Morphine Dependence; D011569:Psychiatric Status Rating Scales; D011613:Psychotherapy; D012380:Role; D012494:Sampling Studies; D012737:Sex Factors; D012917:Social Adjustment; D012959:Socioeconomic Factors; D019966:Substance-Related Disorders / Q000628:therapy
chemical_list: D003932:Heroin; D008691:Methadone