Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in this Registration Statement on Form S-3
of our report dated February 24, 2009 relating to the financial statements, financial statement schedule and the
effectiveness of internal control over financial reporting, which appears in °ÙÃĵ¼º½’s Annual
Report on Form 10-K for the year ended December 31, 2008. We also consent to the reference to us under the heading
“Experts’’ in such Registration Statement.
/s/ PricewaterhouseCoopers LLP
PricewaterhouseCoopers LLP
Pittsburgh, Pennsylvania
February 26, 2009