In line with our findings, previous cohort studies found no association between glioma risk and levels of IL‐13, TNF‐α, CXCL13, MIP‐1α, MIP‐1β, fractalkine, FGF2, TGF‐α, sCD23, sCD27 and sCD30.10, 11, 12. Here, CXCL13 is linked to glioma.