Abbreviations
Abbreviations used in this paper are as follows: ARDS, acute respiratory distress syndrome; COVID-19, coronavirus disease 2019; CT, computed tomography; ECMO, extracorporeal membrane oxygenation; GGO, ground-glass opacities; ICU, intensive care unit; RCT, randomized controlled trial; Rh, Rhesus; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2