EXHIBIT 2
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                      IDENTIFICATION AND CLASSIFICATION OF SUBSIDIARIES WHICH ACQUIRED SECURITIES
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                              Smith Barney Fund Management LLC and Salomon Brothers Asset
                                Management Inc. are investment advisers 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 subsidiaries which acquired the
                                      securities filed for in this Schedule 13G.



                    Date: September 10, 2004


                                          CITIGROUP GLOBAL MARKETS HOLDINGS INC.


                                          By: /s/ David C. Goldberg
                                              --------------------------------
                                              Name:  David C. Goldberg
                                              Title: Assistant Secretary


                                          CITIGROUP INC.


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