CD274 and neoplasm: On stratification by tumor type, ethnicity, and sample size, the data showed that PD-L1 remained a significant factor of poor OS in patients with eCCA (n=7, HR=1.73, 95% CI=1.08–2.75, p=0.022) and for patients with iCCA (n=4, HR=1.79, 95% CI=1.42–2.25, p<0.001), but not for patients with GBC (n=1, HR=1.92, 95% CI=0.95–3.88, p=0.069; Table 2 and Figure 2B).