definiens: would be defined as the immunization ofXenoMouse Animals with either or both of the Antigens and the use of XenoMouse Animals that are so immunized and materials derived from XenoMouse Animals that are so immunized, in each case solely for the creation, identification, analysis, research, and preclinical development of Products for use in the Field . For purposes of clarification, but without limitation, the Research Field would not include ( i ) the creation, breeding or development of mice or any traDsgeiric animals, ( ii ) use in humans of materials derived in whole or part from the XenoMouse Animals ( including without limitation Products ), ( iii ) use of XenoMouse Animals or materials derived in whole or part from XenoMouse Animals ( including without limitation Products ) for screening or other research, or for any purpose other than the creation, identification, analysis, research and development of ProductS for use in the Field, or ( iv ) the transfer, sale, lease, offer for sale or lease, or other transfer of title to or an interest in XenoMouse Animals or any materials derived in whole or part from the XenoMouse Animals ( including without limitation Products )