Baseline predictors for 28-day COVID-19 severity and mortality among hospitalized patients: results from the IMPACC study. - Hou J; Haslund-Gourley B; Diray-Arce J; Hoch A; Rouphael N; Becker PM; Augustine AD; Ozonoff A; Guan L; Kleinstein SH; Peters B; Reed E; et al. (Frontiers in medicine, 2025)