KLK3 and prostate cancer: ROC analysis of the diagnostic efficiency of differential long non-coding ribonucleic acids (lncRNAs) (RP11-33A14.1, RP11-423H2.3, and LAMTOR5-AS1) and serum prostate-specific antigen (PSA) in prostate cancer (PCa) patients and benign prostatic hyperplasia (BPH) controls.