PPSP having an effect on utilization rates.
D003284:Contract Services / Q000458:organization & administration*; D005251:Fees, Medical; D005376:Financial Management / Q000458:organization & administration*; D006296:Health Services / Q000706:statistics & numerical data; D006801:Humans; D008484:Medicaid / Q000191:economics*; D008824:Michigan; D010820:Physicians