PPIB and cancer: A Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis of Cluster 3 included protein processing in endoplasmic reticulum, protein export, and oxidative phosphorylation; the KEGG analysis of Cluster 9 included cell cycle and spliceosome; the KEGG analysis of Cluster 10 included the B cell receptor signaling pathway; and the KEGG analysis of Cluster 12 included transcriptional misregulation in cancer (Fig. 2F).