Forbi, Joseph C. “Seroprevalence of Syphilis Among a Cohort of HIV-Infected Subjects in North Central Nigeria”. Journal of Health, Population and Nutrition 27, no. 5 (November 23, 2009): 704–706. Accessed October 7, 2025. https://www.banglajol.info/index.php/JHPN/article/view/3782.