Beckman, L, K Bergdahl, B Cedergren, MG Damber, S Lidén, B von Schoultz, and T. Stigbrand. “Increased Serum Levels of the Pregnancy Zone Protein in Psoriasis”. Acta Dermato-Venereologica 57, no. 5 (September 1, 1977): 403–406. Accessed June 1, 2026. https://medicaljournalssweden.se/actadv/article/view/17411.