EX-23.1 4 dex231.txt EXHIBIT 23.1 Exhibit 23.1 Consent of Independent Public Accountants As independent public accountants, we hereby consent to the incorporation of our report included in this Form 10-K into the Company's previously filed registration statements: Registration Statements on Form S-3: Registration Number Date Filed ------------------- ---------- 333-47762 October 11, 2000 333-58436 April 6, 2001 333-81622 January 29, 2002 Registration Statement on Form S-4: 333-65278 July 17, 2001 Registration Statements on Form S-8:
Name Registration Number Date Filed ---- ------------------- ---------- 1999 Stock Option and Restricted Stock Grant Plan 333-78123 May 10, 1999 1999 Stock Option and Restricted Stock Grant Plan 333-42342 July 27, 2000 1999 Stock Option and Restricted Stock Grant Plan 333-62718 June 11, 2001
/s/ ARTHUR ANDERSEN LLP Baltimore, Maryland, March 22, 2002