Figure 1

Flow chart and enrollment of the study cohort. HFOV: high frequency oscillatory ventilation; OI: oxygenation index; GA: gestational age; NICU: neonatal intensive care unit; CGMH: Chang Gung Memorial Hospital.

Flow chart and enrollment of the study cohort. HFOV: high frequency oscillatory ventilation; OI: oxygenation index; GA: gestational age; NICU: neonatal intensive care unit; CGMH: Chang Gung Memorial Hospital.