Perspectives. Preferred providers proliferate.
D002140:California; D003284:Contract Services / Q000639:trends*; D004465:Economic Competition / Q000331:legislation & jurisprudence; D005376:Financial Management / Q000639:trends*; D006264:Health Benefit Plans, Employee / Q000639:trends*; D007348:Insurance, Health / Q000639:trends*; D014481:United States