Exhibit 23.1
Consent of Independent Registered Public Accounting Firm
We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (No. 333-154708) of our report dated March18, 2011 relating to the consolidated financial statements and financial statement schedule which appears in this Form 10-K.
/s/ BKM Sowan Horan, LLP
Addison, Texas
March 18, 2011