title: The main line to Europe.
mesh_terms: D004335:Drug and Narcotic Control; D005060:Europe; D006556:Heroin Dependence / Q000517:prevention & control*; D006801:Humans; D009892:Opium; D019966:Substance-Related Disorders / Q000517:prevention & control*; D006113:United Kingdom
chemical_list: D009892:Opium