PTBP3 and renal cell carcinoma: Univariate Cox regression analysis suggested that PTBP3 expression was a significant prognostic factor for the overall ratio (HR 0.487, 95% confidence interval [CI], 0.361–0.656; p < 0.001) and disease-free survival (HR 0.486, 95%CI, 0.354–0.669; p < 0.001) in patients with RCC (Table S1).