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Exhibit A
AGREEMENT OF FILING OF SCHEDULE 13G
The undersigned acknowledge and agree that the foregoing statement on Schedule
13G is filed on behalf of each of the undersigned and that all subsequent
amendments to this statement on Schedule 13G shall be filed on behalf of each of
the undersigned without the necessity of additional joint filing statements. The
undersigned acknowledge that each shall be responsible for the timely filing of
such amendments, and for the completeness and accuracy of the information
concerning the others, except to the extent that it knows or has reason to
believe that such information is inaccurate. This Agreement may be executed in
any number of counterparts and all such counterparts taken together shall
constitute one and the same instrument.
XXXXXXX, XXXXXX VENTURES, L.P.
Dated: February 14, 2001 By: Xxxxxxx, Xxxxxx & Co., General Partner
By: Xxxxx X. Xxxxxxx
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Xxxxx X. Xxxxxxx
Attorney-in-Fact
WARBURG, XXXXXX & CO.
Dated: February 14, 2001
By: Xxxxx X. Xxxxxxx
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Xxxxx X. Xxxxxxx
Attorney-in-Fact
X.X. XXXXXXX, XXXXXX & CO., LLC
Dated: February 14, 2001
By: /s/ Xxxxx Xxxxxxx
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Xxxxx X. Xxxxxxx
Attorney-in-Fact
