Exhibit 99.1
JOINT FILING AGREEMENT
The undersigned hereby agree that the foregoing statement on Schedule 13G is
filed on behalf of each of the undersigned in accordance with the provisions of
Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, and that
all subsequent amendments to this statement on Schedule 13G may be filed on
behalf of each of the undersigned without the necessity of filing additional
joint filing agreements.
Dated: September 8, 2008
S.A.C. CAPITAL ADVISORS, LLC
By: /s/ Xxxxx Xxxxxxxx
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Name: Xxxxx Xxxxxxxx
Title: Authorized Person
S.A.C. CAPITAL MANAGEMENT, LLC
By: /s/ Xxxxx Xxxxxxxx
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Name: Xxxxx Xxxxxxxx
Title: Authorized Person
CR INTRINSIC INVESTORS, LLC
By: /s/ Xxxxx Xxxxxxxx
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Name: Xxxxx Xxxxxxxx
Title: Authorized Person
SIGMA CAPITAL MANAGEMENT, LLC
By: /s/ Xxxxx Xxxxxxxx
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Name: Xxxxx Xxxxxxxx
Title: Authorized Person
XXXXXX X. XXXXX
By: /s/ Xxxxx Xxxxxxxx
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Name: Xxxxx Xxxxxxxx
Title: Authorized Person
