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<PAGE> 1
EXHIBIT 99.1
JOINT FILING STATEMENT
We, the signatories of the Statement on Schedule 13D to which this Joint
Filing Statement 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: June 19, 2000 VULCAN VENTURES
INCORPORATED
By: /s/ WILLIAM D. SAVOY
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Name: William D. Savoy
Title: President
Dated: June 19, 2000 *
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Paul G. Allen
*By: /s/ WILLIAM D. SAVOY
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William D. Savoy as Attorney-in-Fact for
Paul G. Allen pursuant to a Power of
Attorney filed on August 30, 1999, with
the Schedule 13G of Vulcan Ventures
Incorporated and Paul G. Allen for
Pathogenesis, Inc. and incorporated
herein by reference
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