By the Numbers. Insurers and managed care.
D054598:Blue Cross Blue Shield Insurance Plans / Q000706:statistics & numerical data; D003625:Data Collection; D006754:Hospital Restructuring / Q000706:statistics & numerical data; D007348:Insurance, Health / Q000706:statistics & numerical data*; D008329:Managed Care Programs / Q000706:statistics & numerical data*; D014481:United States