İnci, Ayşe, Sibel Ceylan, and Birgül Mete. “Secondary Syphilis and Human Immunodeficiency Virus Coinfection”. Disease and Molecular Medicine 4, no. 2 (June 30, 2016): 21-23. Accessed November 29, 2020. http://dismolmed.org/index.php/dmm/article/view/59.