High-Frequency VentilationHigh-Frequency Jet VentilationIntermittent Positive-Pressure VentilationVentilator WeaningRespiration, ArtificialWork of BreathingRespiratory Distress Syndrome, NewbornVentilationPulmonary VentilationInfant, PrematureInfant, Very Low Birth WeightInfant, NewbornMandatory TestingTidal VolumeMandatory ProgramsPositive-Pressure RespirationNoninvasive VentilationRespirationRespiratory MechanicsVentilators, MechanicalPulmonary Gas ExchangeMandatory ReportingCarbon DioxideVentilation-Perfusion RatioIntubation, Intratracheal