Reforming health care delivery: the Massachusetts Blues' role.
D054598:Blue Cross Blue Shield Insurance Plans / Q000706:statistics & numerical data*; D003363:Cost Control; D003695:Delivery of Health Care / Q000191:economics*; D006279:Health Maintenance Organizations / Q000706:statistics & numerical data; D007350:Insurance, Hospitalization / Q000706:statistics & numerical data*; D007357:Insurance, Physician Services / Q000706:statistics & numerical data*; D008404:Massachusetts