Comment on article by Levin and Rao.
Hammond
Ian
I
D004465:Economic Competition / Q000706:statistics & numerical data*; D006268:Health Facilities / Q000706:statistics & numerical data*; D006300:Health Services Misuse; D011871:Radiology / Q000706:statistics & numerical data*; D011872:Radiology Department, Hospital / Q000706:statistics & numerical data*; D014600:Utilization Review