None of the clinical features in the two groups was compared with the difference in terms of gender, age, Eastern Cooperative Oncology Group Performance Status (ECOG PS), PD-L1 expression status, primary tumor site, histological differentiation, number of metastatic sites, presence of liver metastasis, smoking and drinking habit, and anti-PD-1 treatment line and type (Table 1). The gene discussed is CD274; the disease is neoplasm.