EX-99.A.2 3 y45330exv99waw2.htm EX-99.A.2: JOINT FILING AGREEMENT EX-99.A.2
 

Exhibit A
JOINT FILING AGREEMENT
PURSUANT TO RULE 13d-1(k)
     The undersigned acknowledge and agree that the foregoing statement on Schedule 13D is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13D may be filed on behalf of each of the undersigned without the necessity of filing additional joint filing agreements. The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning him or it contained herein or therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that he or it knows or has reason to believe that such information is inaccurate.
DATED: December 26, 2007
         
  S.A.C. CAPITAL ADVISORS, LLC
 
 
  By:   /s/ Peter Nussbaum  
    Name:   Peter Nussbaum   
    Title:   Authorized Person   
 
  S.A.C. CAPITAL MANAGEMENT, LLC
 
 
  By:   /s/ Peter Nussbaum  
    Name:   Peter Nussbaum   
    Title:   Authorized Person   
 
  CR INTRINSIC INVESTORS, LLC
 
 
  By:   /s/ Peter Nussbaum  
    Name:   Peter Nussbaum   
    Title:   Authorized Person   
 

 


 

         
  SIGMA CAPITAL MANAGEMENT, LLC
 
 
  By:   /s/ Peter Nussbaum  
    Name:   Peter Nussbaum   
    Title:   Authorized Person   
 
  STEVEN A. COHEN
 
 
  By:   /s/ Peter Nussbaum  
    Name:   Peter Nussbaum   
    Title:   Authorized Person