KLK3 and neoplasm: Pairwise comparison revealed significant differences (q ≤ 0.05) in the expression of all markers between PBMCs and tumor cells, with the exception of SLFN11 and AR-V7 between PBMCs and PC-3 cells, and EPCAM, PSA, and PSMA between PBMCs and NCI-H1299 cells.