MARTINS, C. S.; NUNES, R. Portuguese Advance Directives-a twist against futility? A cross sectional study. São Paulo Medical Journal, [S. l.], v. 142, n. 3, p. 1–7, 2025. Disponível em: https://periodicosapm.emnuvens.com.br/spmj/article/view/3030. Acesso em: 16 oct. 2025.