title: Persistent nonmalignant pain: implications and opportunities for managed care.
mesh_terms: D002908:Chronic Disease; D019468:Disease Management; D006801:Humans; D008329:Managed Care Programs; D010148:Intractable Pain / Q000191:economics / Q000453:epidemiology / Q000628:therapy*; D017410:Practice Guidelines as Topic; D014481:United States