There were positive correlations between P4HA1 expression and the expression of four DNA methyltransferases (DNMT1, DNMT2, DNMT3A, and DNMT3B) in ACC, CESC, chromophobe RCC, papillary RCC, LGG, PRAD, READ, SKCM, TGCT, THCA, UCEC, and UVM (Supplementary Figure S8). This evidence concerns the gene P4HA1 and cervical squamous cell carcinoma.