Gossop, M A six country survey of the content and structure of heroin treatment programmes using methadone. [electronic resource] - British journal of addiction Sep 1991 - 1151-60 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0952-0481 Standard No.: 10.1111/j.1360-0443.1991.tb01883.x doi Subjects--Topical Terms: Cross-Cultural ComparisonCross-Sectional StudiesHeroin Dependence--epidemiologyHumansIncidenceMethadone--therapeutic use