The contribution of treatment data to epidemiologic perspectives of narcotic addiction.
D003710:Demography; D004812:Epidemiologic Methods; D005069:Evaluation Studies as Topic; D006268:Health Facilities / Q000706:statistics & numerical data; D006801:Humans; D019966:Substance-Related Disorders / Q000453:epidemiology* / Q000534:rehabilitation; D014481:United States