EXHIBIT 23.1

CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (File Number 333-188735, 333-151812, 333-122974, 333-108128, 333-56980 and 333-166507) and Form S-3 (File Number 333-182100) of our report dated February 24, 2014 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

February 24, 2014