The terms and conditions herein constitute the entire agreement between the Parties with respect to the subject matter hereof and shall supersede all previous agreements, whether electronic, oral or written, between the Parties hereto with respect to the subject matter hereof, except for the Research Collaboration Agreement which, once executed, shall not be amended, modified or superseded in any respect by the terms of this Agreement. No agreement of understanding bearing on this Agreement shall be binding upon either Party hereto unless it shall be in writing and signed by the duly authorized officer or representative of each of the Parties and shall expressly refer to this Agreement. Except as set forth in Section 18.10, electronic communication between the Parties shall not constitute an agreement of understanding, unless it is subsequently reduced to writing and signed by the duly authorized officer or representative of each of the Parties and shall expressly refer to this Agreement.