Preparing for managed competition. Utilization of ophthalmologic services varies by state.
Javitt
J C
JC
Chiang
Y P
YP
D006296:Health Services / Q000706:statistics & numerical data*; D006801:Humans; D008329:Managed Care Programs / Q000706:statistics & numerical data*; D006278:Medicare; D009885:Ophthalmology; D014481:United States