Trends in Disease Severity Among Critically Ill Children With Severe Acute Respiratory Syndrome Coronavirus 2: A Retrospective Multicenter Cohort Study in the United States. - Ross CE; Burns JP; Grossestreuer AV; Bhattarai P; McKiernan CA; Franks JD; Lehmann S; Sorcher JL; Sharron MP; Wai K; Al-Wahab H; Boukas K; et al. (Pediatric critical care medicine : a journal of the Society of Critical Care Medicine and the World Federation of Pediatric Intensive and Critical Care Societies, 2023)