JOINT FILING AGREEMENT
In accordance with Rule 13d-1(k)(1) under the Securities Act of 1934, the
undersigned hereby agree to the joint filing with each other of the attached
statement on Schedule 13G and to all amendments to such statement and that such
statement and all amendments to such statement is made on behalf of each of
them.
IN WITNESS WHEREOF, the undersigned hereby execute this Agreement on July
10, 2007.
NATIONWIDE SA CAPITAL TRUST
By:/s/Xxxxxx X. Xxxxxxx
Name: Xxxxxx X. Xxxxxxx
Title: Senior Vice President
NATIONWIDE FUND ADVISORS
By:/s/Xxxxxx X. Xxxxxxx
Name: Xxxxxx X. Xxxxxxx
Title: Senior Vice President
