Exhibit 23 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statements on Forms S-8 (Registration Nos. 33-31978, 33-71390, 33-86672, 333-17979, 333-38891, 333-59177, 333-42054, and 333-56736) and Form S-3 (Registration No. 333-38893) of our report dated March 6, 2001 relating to the financial statements and financial statement schedule, which appears in this Form 10-K. We also consent to the reference to us under the heading "Selected Financial Data" in this Form 10-K. /s/ PricewaterhouseCoopers LLP - ------------------------------ PricewaterhouseCoopers LLP Philadelphia, Pennsylvania April 26, 2001