Merger mania? The managed care field consolidates--but bigger isn't always better.
Hagland
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D003625:Data Collection; D006273:Health Facility Merger / Q000706:statistics & numerical data / Q000639:trends*; D006279:Health Maintenance Organizations / Q000458:organization & administration* / Q000706:statistics & numerical data / Q000639:trends; D017146:Models, Organizational; D014481:United States