Exhibit 1
JOINT FILING AGREEMENT
The undersigned hereby agree that the statement on Schedule 13D filed
by the undersigned with respect to the Common Stock and Exchangeable Preferred
Stock of the Allos Therapeutics, Inc. is, and any amendment thereto signed by
each of the undersigned shall be, filed on behalf of each undersigned pursuant
to and in accordance with the provisions of Rule 13d-1(k) under the Securities
Exchange Act of 1934, as amended.
Dated: Xxxxx 0, 0000 XXXXXXX PINCUS PRIVATE EQUITY VIII, L.P.
By: Warburg Pincus & Co.,
General Partner
By: /s/ Xxxxx X. Xxxxxxx
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Name: Xxxxx X. Xxxxxxx
Title: Partner
Dated: March 7, 2005 WARBURG PINCUS & CO.
By: /s/ Xxxxx X. Xxxxxxx
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Name: Xxxxx X. Xxxxxxx
Title: Partner
Dated: Xxxxx 0, 0000 XXXXXXX PINCUS LLC
By: /s/ Xxxxx X. Xxxxxxx
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Name: Xxxxx X. Xxxxxxx
Title: Managing Director
