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                                                                    EXHIBIT 23.1


                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

As independent public accountants, we hereby consent to the incorporation by
reference of our report dated March 16, 2000 included in this registration
statement, into the Company's previously filed registration statements on Form
S-8 (File No. 333-61953, 333-92875, 333-92877 and 333-93681).


/s/ ARTHUR ANDERSEN LLP

Houston, Texas
March 29, 2000