KLK3 and benign prostatic hyperplasia: Contrary to these results, Llop, et al reported that the core fucosylation level of serum PSA in high-risk PCa was significantly reduced compared to BPH and low-risk PCa, with an Enzyme-linked Lectin Assay (ELLA) including a double immunoprecipitation of serum PSA followed by Phliota squarrosa lectin (PhoSL) detection, which recognizes only core fucosylation 38.