EX-99.A 2 ss416431_ex99a.htm JOINT FILING AGREEMENT
               
Exhibit A
 
JOINT FILING AGREEMENT
         
Pursuant to Rule 13d-1(k)(1) of the Securities and Exchange Commission under the Securities Exchange Act of 1934, as amended, each of the undersigned agrees that the statement on Schedule 13G filed herewith shall be filed on behalf of each of the undersigned and further agrees that this joint filing agreement be included as an exhibit to this Schedule 13G.  In evidence thereof, the undersigned hereby execute this Agreement as of February 13, 2015.
            
  ASCENT BIOMEDICAL VENTURES I, L.P.  
         
  By: ABV, LLC  
    its general partner  
         
  /s/ Steve Hochberg  
  Signature  
     
  Director  
  Name/Title  
         
               
  ASCENT BIOMEDICAL VENTURES I ANNEX, L.P.  
         
  By: ABV, LLC  
    its general partner  
         
  /s/ Steve Hochberg  
  Signature  
     
  Director  
  Name/Title  
         
            
  ASCENT BIOMEDICAL VENTURES I NY, L.P.  
         
  By: ABV, LLC  
    its general partner  
         
  /s/ Steve Hochberg  
  Signature  
     
  Director  
  Name/Title  
         
             
  ABV, LLC  
         
         
  /s/ Steve Hochberg  
  Signature  
     
  Director  
  Name/Title  
         
 
 
 
 
                  

  GEOFFREY W. SMITH  
         
         
  /s/ Geoffrey W. Smith  
  Signature  
     
         
               
  STEVE HOCHBERG  
         
         
  /s/ Steve Hochberg  
  Signature