fig1
![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.1.png)
Figure 1. Flow diagram for selection of studies. PD-1: programmed cell death protein 1; OS: overall survival
Figure 1. Flow diagram for selection of studies. PD-1: programmed cell death protein 1; OS: overall survival
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