title: Testing in prepaid versus fee-for-service group practices.
mesh_terms: D003954:Diagnostic Services / Q000706:statistics & numerical data*; D005251:Fees, Medical; D006123:Group Practice / Q000592:standards*; D006279:Health Maintenance Organizations / Q000592:standards*; D009042:Motivation; D011787:Quality of Health Care; D014481:United States