PDIA3 and posterior cortical atrophy: Future expression analyses of PDIA3 and PDIA3N in clinical samples, correlated to the Gleason score and androgen dependency stage of PCa, are necessary to determine if PDIA3N is a suitable biomarker for advanced PCa as well as the role of PDIA3, PDIA3N and the vitamin D endocrine system in regulating prostate cell biology.