“Comparison in Relation to the Incidence of Congenital Syphilis and Gestational Syphilis in the Last 5 Years in the State of Piauí”. Research, Society and Development 10, no. 17 (December 21, 2021): e48101724301. Accessed June 28, 2025. https://ojs34.rsdjournal.org/index.php/rsd/article/view/24301.