MHR INSTITUTIONAL PARTNERS III LP

By:	MHR Institutional Advisors III LLC,
	its General Partner
By:	/s/ Hal Goldstein	03/06/2009
	Name: Hal Goldstein	Date
	Title: Vice President

Address: 40 West 57th Street, 24th Floor
New York, New York 10019

MHR FUND MANAGEMENT LLC

By:	/s/ Hal Goldstein	03/06/2009
	Name: Hal Goldstein	Date
	Title: Managing Principal

Address: 40 West 57th Street, 24th Floor
New York, New York 10019

MARK RACHESKY, M.D.

By:	/s/ Hal Goldstein, Attorney in Fact	03/06/2009
		Date

Address: 40 West 57th Street, 24th Floor
New York, New York 10019