MESSINA, S. COVID-19 Shortages: Clear guidelines and advanced directives could ease allocation decisions. Voices in Bioethics, [S. l.], v. 6, 2020. DOI: 10.7916/vib.v6i.5832. Disponível em: https://journals.library.columbia.edu/index.php/bioethics/article/view/5832. Acesso em: 17 aug. 2022.