CXCR4 and diffuse large B-cell lymphoma: The combined effect (random effect model, I2 = 0.0%, P = 0.523) showed that the CXCR4 expression in patients with DLBCL had no significant influence on PFS (HR = 1.14, 95% CI: 0.992 to1.307, P = 0.065) (Figure 1(c)).