H1-4 and prostate cancer: The other selected genes are HIST1H1E, LRAT, LCN2, KCNN4, RHOU, and EPHA5 in the order of them entering the model, among which LRAT [30], LCN2 [31], RHOU [32], and EPHA5 [33] are known to link to prostate cancer, and HIST1H1E and KCNN4 are connected to myeloma [34] and pancreatic cancer [35], respectively.