CXCR1 and renal cell carcinoma: The relevance of targeting the ELR+CXCL/CXCR1/2 axis was assessed by correlating the intra-tumor mRNA levels of ELR+CXCL cytokines to disease free/progression free (DFS/PFS) (Table 1A) and overall survival (OS) (Table 1B) of the RCC and HNSCC patients.