External validation of the 80+ score and comparison with three clinical scores identifying patients at least 75 years old at risk of unplanned readmission within 30 days after discharge. Swiss Medical Weekly, [S. l.], v. 148, n. 1920, p. w14624, 2018. DOI: 10.4414/smw.2018.14624. Disponível em: https://www.smw.ch/index.php/smw/article/view/2477. Acesso em: 15 oct. 2025.