Silva, R. B. da; Neves, V. R.; Barros, M. C.; Gambassi, B. B.; Schwingel, P. A.; Sobral-Filho, D. C. Autonomic Dysfunction in COVID-19 Patients Receiving Mechanical Ventilation: A Cross-Sectional Study. Sao Paulo Med J 2023, 141, 1-8.