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                                              EXHIBIT 2
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<S>                    <C>
                      IDENTIFICATION AND CLASSIFICATION OF SUBSIDIARY(S) WHICH ACQUIRED SECURITIES
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                           Smith Barney Fund Management LLC, 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 7, 2002


                                          SALOMON SMITH BARNEY HOLDINGS INC.


                                          By: /s/ Joseph B. Wollard
                                              --------------------------------
                                              Name:  Joseph B. Wollard
                                              Title: Assistant Secretary


                                          CITIGROUP INC.


                                          By: /s/ Joseph B. Wollard
                                              --------------------------------
                                               Name:  Joseph B. Wollard
                                               Title: Assistant Secretary

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