EX-99.1 2 a2151123zex-99_1.txt EXHIBIT 99.1 EXHIBIT 1 --------- AGREEMENT AS TO JOINT FILING OF SCHEDULE 13G -------------------------------------------- Each of the undersigned hereby affirms that it is individually eligible to use Schedule 13G, and agrees that this Schedule 13G is filed on its behalf. Date: February 4, 2005 CITIGROUP GLOBAL MARKETS INC. By: /s/ David C. Goldberg -------------------------------------------- Name: David C. Goldberg Title: Assistant Secretary CITIGROUP FINANCIAL PRODUCTS INC. By: /s/ David C. Goldberg -------------------------------------------- Name: David C. Goldberg Title: Assistant Secretary CITIGROUP GLOBAL MARKETS HOLDINGS INC. By: /s/ David C. Goldberg -------------------------------------------- Name: David C. Goldberg Title: Assistant Secretary CITIGROUP INC. By: /s/ David C. Goldberg -------------------------------------------- Name: David C. Goldberg Title: Assistant Secretary