EA., Johansson. “The Use of Standard Serological Tests for Syphilis in Screening for Auto-Immune Connective Tissue Disease. Chronic Biological False-Positive Reactions and Anticomplementary Activity”. Acta Dermato-Venereologica 50, no. 4 (November 12, 2019): 305–308. Accessed June 22, 2026. https://medicaljournalssweden.se/actadv/article/view/1583.