definiens: means the development of an undesirable medical condition orthe deterioration of a pre - existing medical condition in a patient or clinical investigation subjectfollowing or during exposure to or use of a Licensed Product, whether or not considered causallyrelated to such Licensed Product, the exacerbation of any pre - existing condition(s ) occurringfollowing or during the use of the Licensed Product, or any other adverse experience or adversedrug experience ( as described in any applicable corresponding regulations in countries withinthe1/66Collaboration & License Agreement_Nektar_Daiichi Sankyo Europe_May 2016***Text Omitted and Filed Separately with the Securities and ExchangeCommission . Confidential Treatment Requested Under17 C.F.R. Sections 200.80(b)(4 ) and 240.24b-2 Territory, as may be amended from time to time ) occurring following or during exposure to or useof a Licensed Product