Blue Shield responds to commentary.
D000553:Ambulatory Care / Q000191:economics; D054598:Blue Cross Blue Shield Insurance Plans / Q000191:economics / Q000592:standards*; D006760:Hospitalization / Q000191:economics; D006801:Humans; D007349:Insurance, Health, Reimbursement / Q000191:economics / Q000592:standards; D007357:Insurance, Physician Services / Q000592:standards*; D007358:Insurance, Psychiatric / Q000191:economics / Q000592:standards*; D008404:Massachusetts