Figure 2. Workflow of bioinformatics analysis. SCLC: Small-cell lung cancer; GDSC: The Genomics of Drug Sensitivity in Cancer Project; TCGA: The Cancer Genome Atlas; WES: whole-exome sequencing; DDR: DNA damage response and repair; ssGSEA ES: ssGSEA: single sample gene-set enrichment analysis enrichment score; LUAD: Lung adenocarcinoma; LUSC: Lung squamous cell carcinoma; TMB: Tumor mutational burden.