POU2F1 and gastric cancer: Results with GSE62254 dataset in gastric cancer in the NCBI-GEO database showed that seven predicted transcriptional factors were associated with PD-L1, including STAT4 (r = 0.577, P < 0.0001), STAT5A (r = 0.451, P < 0.0001), YY1 (r = −0.166, P = 0.008), POU2F1 (r = −0.165, P = 0.008), AR (r = −0.152, P = 0.015), RELA (r = 0.206, P = 0.001), SP1 (r = 0.155, P = 0.013) (Figure 5C).