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Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

        We consent to the use of our reports with respect to the consolidated financial statements and the effectiveness of internal control over financial reporting incorporated by reference herein and to the reference to our firm under the heading "Experts" in the prospectus.

/s/ KPMG LLP
Dallas, Texas
January 28, 2011

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Exhibit 23.1

Consent of Independent Registered Public Accounting Firm