Except as amended by the provisions of this letter agreement, the terms and provisions contained in the Asset Purchase Agreement shall continue to govern the rights and obligations of the parties, and all provisions and covenants in the Asset Purchase Agreement shall remain in full force and effect as stated therein. This letter agreement and the Asset Purchase Agreement constitute the entire agreement and supersede all prior agreements and understandings, both written and oral, among the parties with respect to the subject matter thereof and hereof.