To mention, we confirmed that all cell lines expressed PD-L1, but at different levels (Figure 1C, NCI-H2228 > HCC-78 > A549, 69.2 ± 8.0% on NCI-H2228, 61.8 ± 4.6% on HCC-78 and 6.0 ± 2.0% on A549). The gene discussed is CD274; the disease is hepatocellular carcinoma.