A 5-gene recurrence predictor of prostate cancer [34] contains KLF6, three common ARACNe-based predictions between MYC and KLF6 (FOS, JUNB and ZFP36), and PPFIA3, which is functionally related to another predicted target of KLF6 (PPFIBP2) (Fig. 3B). This evidence concerns the gene PPFIBP2 and Familial prostate cancer.