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FIG 1. Map of the United States depicts the 10 HCFA regions. The use rate of MR angiography per 100,000 Medicare beneficiaries is shown in each region
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FIG 1. Map of the United States depicts the 10 HCFA regions. The use rate of MR angiography per 100,000 Medicare beneficiaries is shown in each region
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Copyright © 2009 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X