Private MDs regroup to fight HMO pinch.
D004465:Economic Competition / Q000639:trends; D006264:Health Benefit Plans, Employee / Q000191:economics*; D006279:Health Maintenance Organizations / Q000706:statistics & numerical data*; D007348:Insurance, Health / Q000191:economics*; D008910:Minnesota; D011331:Private Practice / Q000191:economics*; D013997:Time Factors