RBAK and nonpapillary renal cell carcinoma: RBAK (P = 3.9×10−5), SCRT2 (P = 4.8×10−5), and ZBTB12 (P = 4.1×10−5) were associated to papRCC only, of which RBAK did not have suggestive associations with ccRCC or RCC (Supplementary Table 1).