Group Health study dispels myth of risk skimming, helps revamp rates.
D003625:Data Collection; D006264:Health Benefit Plans, Employee / Q000706:statistics & numerical data*; D006279:Health Maintenance Organizations / Q000706:statistics & numerical data*; D007341:Insurance; D015273:Insurance Selection Bias; D007348:Insurance, Health / Q000706:statistics & numerical data*; D008910:Minnesota