title: Why are we concerned about illegal narcotic use?
mesh_terms: D000293:Adolescent; D001315:Australia; D003415:Crime; D004335:Drug and Narcotic Control / Q000191:economics; D006801:Humans; D009017:Morbidity; D009293:Opioid-Related Disorders / Q000401:mortality; D012846:Singapore; D014481:United States