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EXHIBIT 1
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AGREEMENT AS TO JOINT FILING OF SCHEDULE 13G
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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: December 8, 2000
SALOMON SMITH BARNEY INC.
By: /s/ Howard M. Darmstadter
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Name: Howard M. Darmstadter
Title: Assistant Secretary
SALOMON BROTHERS HOLDING COMPANY INC
By: /s/ Howard M. Darmstadter
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Name: Howard M. Darmstadter
Title: Assistant Secretary
SALOMON SMITH BARNEY HOLDINGS INC.
By: /s/ Howard M. Darmstadter
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Name: Howard M. Darmstadter
Title: Assistant Secretary
CITIGROUP INC.
By: /s/ Joseph B. Wollard
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Name: Joseph B. Wollard
Title: Assistant Secretary
