Our data showed (Figure 4A,B) that GBM patients with high CXCR4 expression had a shorter survival time, whereas CXCR1, CXCR2, CXCR3, CXCR5, and CXCR6 expression had no prognostic significance in GBM. Here, CXCR2 is linked to glioblastoma.