4-1BB co-stimulation further enhances anti-PD-1-mediated reinvigoration of exhausted CD39+ CD8 T cells from primary and metastatic sites of epithelial ovarian cancers ====================================================================================================================================================================== * Galam Leem * Junsik Park * Minwoo Jeon * Eui-Soon Kim * Sang Wun Kim * Yong Jae Lee * Seong Jin Choi * Baekgyu Choi * Seongyeol Park * Young Seok Ju * Inkyung Jung * Sunghoon Kim * Eui-Cheol Shin * Jung Yun Lee * Su-Hyung Park