EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED CERTIFIED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (File Number 333-151812, 333-122974, 333-108128, 333-56980 and 333-166507) and Form S-3 (File Number 333-159617) of our report dated March 15, 2011 relating to the financial statements, financial statement schedule and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

/s/    PricewaterhouseCoopers LLP

Tampa, Florida

March 15, 2011