CD274 and neoplasm: To further validate this, we stratified patients into PD‐L1+ tumor group (samples 2, 20, 21, 26, 17, 30, 33, 35, 42, 60, and 7) and PD‐L1− tumor group (samples 61 and 71) based on the PD‐L1 expression on tumor cells (Figure 6B,C; Table S5, Supporting Information).