CXCR2 and neuroblastoma: Low CXCR2 gene expression was associated with better overall survival in NB patients, while high expression was associated with poor prognosis (Versteeg dataset N = 88, p = 0.118; Kocak dataset N = 649, p = 0.019; RPM dataset N = 498, p = 9.2 × 10−6; Oberthuer dataset N = 251, p = 3.7 × 10−6; Figure 1).