title: Opium and the historical perspective.
mesh_terms: D004335:Drug and Narcotic Control / Q000266:history; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D009892:Opium; D019966:Substance-Related Disorders / Q000266:history*; D006113:United Kingdom
chemical_list: D009892:Opium