Factors related to survival in Intensive Care Unit patients with Covid-19: a study from a single center in Brazil. SciELO Preprints, 2022. DOI: 10.1590/SciELOPreprints.4453. Disponível em: https://preprints.scielo.org/index.php/scielo/preprint/view/4453. Acesso em: 2 jun. 2026.