<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>3
<FILENAME>a2101561zex-99_1.txt
<DESCRIPTION>EXHIBIT 99.1
<TEXT>
<Page>

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                                                        EXHIBIT 1
                                                        ---------

<S>                 <C>

                     IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY(S) 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)

                    Each of the undersigned hereby affirms the identification and Item 3
                    classification of the subsidiary(s) which acquired the securities filed
                    for in this Schedule 13G.


                    Date: February 6, 2003


                                         CITIGROUP INC.


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


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