CXCR4 and esophageal squamous cell carcinoma: Pooled analyses indicated that the odds of having the CXCR4 rs6430612 CT genotype in ESCC patients was 0.51 (95% CI = 0.40-0.66, P = 1.7×10-7, still statistically significant after Bonferroni corrections) compared to the CC genotype (Table 2).