Acquired syphilis in the elderly: a literature review. Research, Society and Development, [S. l.], v. 11, n. 2, p. e1511225201, 2022. DOI: 10.33448/rsd-v11i2.25201. Disponível em: https://rsdjournal.org/rsd/article/view/25201. Acesso em: 5 dec. 2025.