When the study by Karachaliou et al. [24] was excluded, the relationship between ERCC1 expression and OS in overall SCLC patients showed no significant association (HR = 1.14, 95% CI = 0.97–1.35, I2 = 24.7%, P = 0.23 for heterogeneity), indicating the study by Karachaliou et al.may affect the OS in overall patients. This evidence concerns the gene ERCC1 and small cell lung carcinoma.