EXHIBIT 99.1
Joint Filing Agreement
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We, the signatories of the statement to which this Joint Filing Agreement
is attached, hereby agree that such statement is filed, and any amendments
thereto filed by either or both of us will be filed, on behalf of each of us.
Dated: January 26, 2000.
VULCAN VENTURES INCORPORATED
January 26, 2000 By: /s/ Xxxxxxx X. Xxxxx
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Xxxxxxx X. Xxxxx, Vice President
January 26, 2000 *
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Xxxx X. Xxxxx
*By: /s/ Xxxxxxx X. Xxxxx
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Xxxxxxx X. Xxxxx as Attorney-in Fact for
Xxxx X. Xxxxx pursuant to a Power of
Attorney filed on August 30, 1999, with
the Schedule 13G of Vulcan Ventures,
Incorporated and Xxxx X. Xxxxx for
Pathogenesis, Inc. and incorporated herein
by reference.
