Epidemiological impact of gestational and congenital syphilis and its relationship with infant mortality in the State of Piauí, Brazil. Research, Society and Development, [S. l.], v. 9, n. 8, p. e856986539, 2020. DOI: 10.33448/rsd-v9i8.6539. Disponível em: https://www.rsdjournal.org/rsd/article/view/6539. Acesso em: 14 dec. 2025.