Global opioid consumption: trends, barriers, and diversion.
D004363:Drug Utilization; D004335:Drug and Narcotic Control; D006801:Humans; D013287:Illicit Drugs; D009020:Morphine / Q000600:supply & distribution; D019966:Substance-Related Disorders; D014480:United Nations; D014944:World Health Organization
D013287:Illicit Drugs; D009020:Morphine