from SC 13G/A
1 page
<page> 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. Dated: February 5, 2001 Salomon Smith Barney Inc. By: /S/ Howard M. Darmstadter Name: Howard M. Darmstadter Title: Assistant Secretary Salomon Brothers Holding Company Inc By: /S/ Howard M. Darmstadter Name: Howard M. Darmstadter Title: Assistant Secretary Salomon Smith Barney Holdings Inc. By: /S/ Howard M. Darmstadter Name: Howard M. Darmstadter Title: Assistant Secretary Citigroup Inc. By: /S/ Joseph B. Wollard Name: Joseph B. Wollard Title: Assistant Secretary
