EXHIBIT 23 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation of our report included in this Form 10-K/A, into the Company's previously filed Registration Statement File Nos. 33-64580, 33-89726, 333-2404, 333-3480, 333-12321, 333-27611, 333-59309, 333-59529 and 333-57766. ARTHUR ANDERSEN LLP Philadelphia, Pennsylvania December 24, 2001