title: Comment on article by Levin and Rao.
authors.forename: Ian
authors.initials: I
authors.lastname: Hammond
mesh_terms: 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