EX-99.1 3 a2069569zex-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, 2002 SALOMON SMITH BARNEY INC. By: /s/ Joseph B. Wollard -------------------------------------------- Name: Joseph B. Wollard Title: Assistant Secretary SALOMON BROTHERS HOLDING COMPANY INC By: /s/ Joseph B. Wollard -------------------------------------------- Name: Joseph B. Wollard Title: Assistant Secretary SALOMON SMITH BARNEY HOLDINGS INC. By: /s/ Joseph B. Wollard -------------------------------------------- Name: Joseph B. Wollard Title: Assistant Secretary CITIGROUP INC. By: /s/ Joseph B. Wollard -------------------------------------------- Name: Joseph B. Wollard Title: Assistant Secretary