The numbers racket. An HMO's approval rating may not say much about its quality.
Spragins
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D019538:Health Care Surveys; D006279:Health Maintenance Organizations / Q000592:standards* / Q000706:statistics & numerical data; D017060:Patient Satisfaction / Q000706:statistics & numerical data*; D011787:Quality of Health Care / Q000145:classification*; D014481:United States