Chromatin accessibility of circulating CD8+ T cells predicts treatment response to PD-1 blockade in patients with gastric cancer oleh Hyun Mu Shin, Gwanghun Kim, Sangjib Kim, Ji Hyun Sim, Jiyeob Choi, Minji Kim, Minsuk Kwon, Sang-Kyu Ye, Dong-Sup Lee, Seung Woo Cho, Seung Tae Kim, Jeeyun Lee, Hang-Rae Kim