Immune Cell Infiltration and the Expression of PD-1 and PD-L1 in Primary PDGFRA-Mutant Gastrointestinal Stromal Tumors

Xiangfei Sun, Jianyi Sun, Wei Yuan, Xiaodong Gao, Min Fu, Anwei Xue, He Li, Ping Shu, Yong Fang, Yingyong Hou, Kuntang Shen, Yihong Sun, Jing Qin, Xinyu Qin