EX-99.1 2 ss118279_ex9901.htm SIGNATURES FOR FORM 4 Unassociated Document
 

Exhibit 99.1

Signatures for Form 4

 
  QUEST DIAGNOSTICS INCORPORATED  
       
       
  By:   /s/ William J. O’Shaughnessy, Jr.  
  Name:  William J. O’Shaughnessy, Jr.  
  Title:  Assistant General Counsel and Secretary  
  Date:  May 6, 2011  
 
 
  SPARK ACQUISITION CORPORATION  
       
       
  By:   /s/ Robert A. Hagemann  
  Name:  Robert A. Hagemann  
  Title:  President  
  Date:  May 6, 2011