<DOCUMENT>
<TYPE>EX-1
<SEQUENCE>2
<FILENAME>a2136183zex-1.txt
<DESCRIPTION>EXHIBIT 1
<TEXT>
<Page>

<Table>
<Caption>

                                                        EXHIBIT 1
                                                        ---------

<S>                 <C>

                              IDENTIFICATION OF THE SUBSIDIARIES WHICH ACQUIRED SECURITIES
                              ------------------------------------------------------------

                       Smith Barney Fund Management LLC and Salomon Brothers Asset Management Inc
                         each an investment advisor in accordance with Section 240.13d-1(b)
                                                    (1)(ii)(E)

                         The undersigned hereby affirms the identification of the subsidiaries
                           which acquired the securities reported in this Schedule 13G.


                    Date: May 10, 2004


                                         CITIGROUP INC.


                                         By: /s/ Serena D. Moe
                                         -------------------------------------
                                         Name:  Serena D. Moe
                                         Title: Assistant Secretary


</Table>

</TEXT>
</DOCUMENT>