Santos, V. B. dos; Stein, A. T. .; Barilli, S. L. S. .; Garbini, A. F. .; Almeida, R. C. de .; Carazai, D. dos R. .; Santos, F. C. dos .; Lutkmeier, R.; Greve, I. H. .; Klafke, A. .; Mussart, K. M. .; Wittke, E. I. Adult Patients Admitted to a Tertiary Hospital for COVID-19 and Risk Factors Associated With Severity: A Retrospective Cohort Study. Rev. Inst. Med. Trop. São Paulo 2022, 64, e20. https://doi.org/10.1590/S1678-9946202264020.