In our study, 48 patients with NSCLC with liver metastasis were evaluated for PD-L1 expression (Figure A2a,b were representative images of positive and negative PD-L1 staining) and 42 patients with NSCLC with liver metastasis were tested for CD4, CD8 and CD68 infiltrates. The gene discussed is CD68; the disease is non-small cell lung carcinoma.