Geographic variation in the utilization of noninvasive diagnostic imaging: national medicare data, 1998-2007.
Parker
Laurence
L
Department of Radiology, Center for Research on the Utilization of Imaging Services, Thomas Jefferson University Hospital, 132 S 10th St, 10th Fl Main, Philadelphia, PA 19107, USA. laurence.parker@jefferson.edu
Levin
David C
DC
Frangos
Andrea
A
Rao
Vijay M
VM
D003952:Diagnostic Imaging / Q000706:statistics & numerical data*; D006801:Humans; D006278:Medicare / Q000706:statistics & numerical data*; D014481:United States