PB2289: PRELIMINARY DATA FROM A FIRST-IN HUMAN PHASE II STUDY OF SEQUENTIAL USE OF SELINEXOR AND CD19 CHIMERIC ANTIGEN RECEPTOR MODIFIED T-CELL THERAPY (CART19) IN PATIENTS WITH RELAPSED OR REFRACTORY B-CELL NON-HODGKIN LYMPHOMA - Ying Zhang; Xiangping Zong; Jiaqi LI; Sixun Jia; Hongzhi Geng; Liangyu Zeng; Qin Yang; Wenzhi Cai; Shuangzhu Liu; Yutong Lu; Lei Yu; Caixia LI; et al. (HemaSphere, 2023)