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 Form S-8 Registration Statements (File Nos. 333-55080 and 333-69828), the Post-Effective Amendment No. 1 on Form S-8 to the Registration Statement on Form S-1 (File No. 333-31032) and Registration Statement on Form S-3 (File No. 333-66972). /s/ Arthur Andersen LLP Ann Arbor, Michigan March 15, 2002