title: Blue Cross Blue Shield responds.
authors.forename: M R
authors.initials: MR
authors.lastname: Lewis
mesh_terms: D054598:Blue Cross Blue Shield Insurance Plans / Q000458:organization & administration*; D006265:Health Care Coalitions; D006297:Health Services Accessibility; D006801:Humans; D007087:Illinois; D009939:Organizations, Nonprofit / Q000458:organization & administration; D013781:Texas