<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>a2185596zex-99_1.txt
<DESCRIPTION>EXHIBIT 99.1
<TEXT>
<Page>


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                                                        EXHIBIT 1
                                                        ---------

<S>                 <C>

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

                        Citigroup Global Markets, Inc. is a broker or dealer registered under
                        Section 15 of the Act (15 U.S.C. 78o).

                        Each of the undersigned hereby affirms the identification and Item 3
                        classification of the subsidiary which acquired the security holdings
                        reported in this Schedule 13G.


                    Date: May 12, 2008


                                         CITIGROUP INC.


                                         By: /s/ Riqueza V. Feaster
                                         -------------------------------------
                                         Name:  Riqueza V. Feaster
                                         Title: Assistant Secretary

</Table>

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</DOCUMENT>