Respiratory Distress Syndrome, AdultRespiratory Distress Syndrome, NewbornRespiration, ArtificialPulmonary SurfactantsAcute Lung InjuryPositive-Pressure RespirationInfant, NewbornSyndromeBarotraumaTidal VolumeInfant, PrematureProne PositionHigh-Frequency VentilationLungPulmonary Gas ExchangeLung InjuryPulmonary Surfactant-Associated Protein BPulmonary AlveoliLung ComplianceExtracorporeal Membrane OxygenationRespiratory Dead SpaceBronchoalveolar Lavage FluidPulmonary EdemaInfant, Premature, DiseasesBlood Gas AnalysisGestational AgeRespiratory MechanicsFetal Organ MaturityRespiratory InsufficiencyLung DiseasesVentilator-Induced Lung InjuryBiological ProductsBronchopulmonary DysplasiaVentilators, MechanicalOxygenIntensive Care UnitsOxygenators, MembraneFatty AlcoholsRespiratory AspirationAPACHEMultiple Organ FailureInfant, Newborn, DiseasesHyaline Membrane DiseaseSepsisPulmonary Surfactant-Associated Protein CPneumothoraxProspective StudiesPneumoniaPregnancyIntensive Care Units, NeonatalAmniotic FluidCritical CarePulmonary Surfactant-Associated ProteinsTreatment OutcomeFatal OutcomeIntensive Care, NeonatalIntensive CarePartial PressurePulmonary AtelectasisPulmonary Surfactant-Associated Protein ARadiography, ThoracicExtravascular Lung WaterBetamethasoneRetrospective StudiesAdministration, InhalationSurface TensionCritical IllnessLung Volume MeasurementsAcute DiseasePulmonary CirculationInfant, Very Low Birth WeightOxygen Inhalation TherapyAdrenal Cortex HormonesSmoke Inhalation InjuryTuberculosis, MiliaryProteolipidsRisk FactorsPneumonia, AspirationInfant, Low Birth WeightTime FactorsRespiratory Function TestsIntubationLeukomalacia, PeriventricularBronchoalveolar LavageSeverity of Illness IndexEmbolism, FatIntubation, IntratrachealHemodynamicsNeuromuscular Blocking AgentsVentilator WeaningCapnographyStress, PsychologicalRespiratory TherapyBirth WeightAir PressureInstillation, DrugPhosphatidylglycerolsDisease Models, AnimalDown SyndromePulmonary Ventilation