EX-99.1 2 rrd276325_311854.htm EXHIBIT rrd276325_311854.html 
                                                                    EXHIBIT 99.1

                              SIGNATURES FOR FORM 4


                              SANOFI-AVENTIS

                              By: /s/ John Felitti
                                  ---------------------------------------------
                              Name:  John Felitti
                              Title: Associate Vice President, Corporate Law,
                                     Financial & Securities Law
                              Date:  April 8, 2011


                              GC Merger Corp.

                              By: /s/ Gregory Irace
                                  ---------------------------------------------
                              Name:  Gregory Irace
                              Title: President
                              Date:  April 8, 2011