CCL11 and renal cell carcinoma: Among the 30 cytokines, only Eotaxin was found to have a significant causal effect on the risk of RCC in males (Odds ratio [OR] = 2.546, 95% confidence interval [CI] = 1.617–4.010, p value = 5.496 × 10−5) with IVW method (Figure 2, Tables S1–S4).