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, into the Company's previously filed Registration Statements on Form S-8 Nos. 333-66714, 333-66712, 333-64688, 333-64690, 33-82486, 33-82488 and 33-63953, and Registration Statement on Form S-3 No. 333-57932. ARTHUR ANDERSEN LLP St. Louis, Missouri, March 22, 2002