title: A change of habit.
authors.forename: Catharine
authors.initials: C
authors.lastname: Sadler
mesh_terms: D000328:Adult; D006556:Heroin Dependence; D006801:Humans; D008297:Male; D019966:Substance-Related Disorders / Q000188:drug therapy / Q000191:economics* / Q000451:nursing* / Q000534:rehabilitation