Levchik, Nadezhda, Marina Ponomareva, Vera Surganova, and Natalia Zilberberg. “Treponema Pallidum Haemagglutination Assay Serum Titres As a Predictor of Cerebrospinal Fluid Abnormalities in Patients With Syphilis”. Acta Dermato-Venereologica 95, no. 7 (March 9, 2015): 841–842. Accessed February 27, 2025. https://medicaljournalssweden.se/actadv/article/view/5864.