Self-referral medicine: a growing consensus for action.
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D054598:Blue Cross Blue Shield Insurance Plans / Q000191:economics; D003363:Cost Control; D018166:Health Care Reform; D006801:Humans; D010414:Pennsylvania / Q000453:epidemiology; D010820:Physicians; D011871:Radiology / Q000191:economics; D012017:Referral and Consultation / Q000145:classification* / Q000191:economics / Q000706:statistics & numerical data; D014481:United States / Q000453:epidemiology