CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation of our report dated March 27, 2002 included in this Form 10-K, into the Company's previously filed Registration Statement File No. 333-33006 on Form S-8, Registration Statement File No. 333-06327 on Form S-8, and Registration Statement File No. 333-48185 on Form S-8. ARTHUR ANDERSEN LLP Chicago, Illinois March 27, 2002