Fig. 1From: A multicenter RCT of noninvasive ventilation in pneumonia-induced early mild acute respiratory distress syndromeFlow diagram for the trial. ICU, intensive care unit; NIV, noninvasive ventilation; ALI, acute lung injury; PaO2/FIO2, arterial oxygen tension/inspired oxygen fraction; CT, computed tomography; SOFA, sequential organ failure assessment; PaCO2, arterial pressure of carbon dioxideBack to article page