The Association Between Prepandemic ICU Performance and Mortality Variation in COVID-19: A Multicenter Cohort Study of 35,619 Critically Ill PatientsBastos LSL, Hamacher S, Kurtz P, Ranzani OT, Zampieri FG, Soares M, Bozza FA, Salluh JIFApr 1, 2024Ranzani OTGroup LeaderI am an epidemiologist.