Mazzanti, G, L Coloni, G DeSabbata, and G. Paladini. “Is HLA B27 a True Marker of Axial Involvement in Psoriatic Arthropathy?”. Acta Dermato-Venereologica 74 (February 1, 1994): 71–72. Accessed June 26, 2026. https://medicaljournalssweden.se/actadv/article/view/5417.