Drug addiction--the extent and nature of the problem.
D000437:Alcoholism; D000661:Amphetamine; D001463:Barbiturates; D002188:Cannabis; D003042:Cocaine; D004739:England; D006213:Hallucinogens; D003932:Heroin; D006801:Humans; D009020:Morphine; D009892:Opium; D012940:Social Problems; D019966:Substance-Related Disorders; D014944:World Health Organization
D001463:Barbiturates; D006213:Hallucinogens; D003932:Heroin; D009020:Morphine; D009892:Opium; D000661:Amphetamine; D003042:Cocaine