Furthermore, the ratio of cytotoxic T cells to regulatory T cells (CD8+:Foxp3+), and cytotoxic T cells to PD‐L1 (CD8+:PD‐L1+) were also found to be suppressed in the microenvironment of gastric cancer tissues compared to those of normal adjacent gastric tissues.68 The gene discussed is CD8A; the disease is gastric cancer.