KLF6 and nonpapillary renal cell carcinoma: PLAUR, BCL2, KLF6, WSB1, PPARGC1A, and PCK1 were identified to be related to the prognosis of ccRCC (Hirata et al., 2009; Syafruddin et al., 2019; Xu et al., 2019; Liu et al., 2020; Shen et al., 2020; Shi et al., 2020).