This Agreement may be executed in one or more counterparts, each of which shall be deemed an original, but all of which shall constitute one and the same document.  Executed copies hereof may be delivered by facsimile or by email in a PDF attachment, and upon receipt, shall be deemed originals and binding upon the parties hereto.  Without limiting or otherwise affecting the validity of executed copies hereof that have been delivered by facsimile or by email in a PDF attachment, the parties shall use diligent efforts to deliver originals as promptly as possible after execution.