Exhibit 23

                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

     As independent public accountants, we hereby consent to the incorporation
of our reports included in this Form 10-K, into the Company's previously filed
Registration Statement on Form S-8 (No. 333-94439), Form S-3/A (No.333-89683),
Form S-3/A (No. 333-35846), Form S-8 (No. 333-50259), Form S-3/A (No. 333-84115)
and Form S-3 (No. 333-50008).


San Antonio, Texas                                 /s/ ARTHUR ANDERSEN LLP
October 26, 2001