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![The potential prognostic and predictive roles of programmed cell death protein 1 expressed by tumor-infiltrating lymphocytes in solid tumors: a meta-analysis](https://image.oaes.cc/02c80646-a4bd-4f45-87f5-f9b96ec87b74/2477.fig.3.png)
Figure 3. Forest plots for subgroup meta-analysis by patient source. The relationships between PD-1 overexpression and OS in Asia patients (A) and in non-Asia patients (B) are shown. PD-1: programmed cell death protein 1; OS: overall survival; CI: confidence interval