CXCL13 and nonpapillary renal cell carcinoma: Seven CXCL genes (CXCL 1/2/3/5/8/13/14) can influence the prognosis of ccRcc patients, and three pairs of interactions between CXCL genes and immune cells (CXCL13- CD8+ exhausted T cells, CXCL 9/10 and M1 cells, CXCL 1/2/3/8 and neutrophils) were identified in this study.