Respiratory Distress Syndrome, NewbornRespiratory Distress Syndrome, AdultPulmonary SurfactantsBiological ProductsInfant, NewbornInfant, PrematureRespiration, ArtificialAcute Lung InjuryPositive-Pressure RespirationSyndromeBarotraumaLungTidal VolumePulmonary Surfactant-Associated Protein BProne PositionHigh-Frequency VentilationPulmonary Gas ExchangePulmonary Surfactant-Associated ProteinsPulmonary Surfactant-Associated Protein ALung InjuryPulmonary AlveoliSurface-Active AgentsLung ComplianceSurface TensionPulmonary Surfactant-Associated Protein CBronchoalveolar Lavage FluidProteolipidsRespiratory Dead SpaceExtracorporeal Membrane OxygenationPulmonary EdemaBlood Gas AnalysisFetal Organ MaturityRespiratory MechanicsLung DiseasesInfant, Newborn, DiseasesFatty AlcoholsRespiratory InsufficiencyGestational AgePulmonary Surfactant-Associated Protein DInfant, Premature, DiseasesVentilator-Induced Lung InjuryBronchopulmonary DysplasiaAnimals, NewbornOxygenVentilators, MechanicalRespiratory AspirationHyaline Membrane DiseaseIntensive Care UnitsOxygenators, MembraneAPACHEMultiple Organ FailurePneumoniaAmniotic FluidPneumothoraxPregnancySepsisProspective StudiesCritical CareTreatment OutcomePartial PressureFatal OutcomeIntensive Care, NeonatalPulmonary AtelectasisIntensive Care Units, NeonatalPhosphatidylglycerolsIntensive CareRadiography, ThoracicExtravascular Lung WaterBetamethasoneAdministration, InhalationBronchoalveolar LavagePhospholipidsLung Volume MeasurementsPulmonary CirculationRetrospective StudiesAcute DiseasePneumonia, AspirationCritical IllnessOxygen Inhalation TherapyTime FactorsAdrenal Cortex HormonesInfant, Very Low Birth WeightSmoke Inhalation InjuryInstillation, DrugTuberculosis, MiliaryRisk FactorsRespiratory Function Tests1,2-DipalmitoylphosphatidylcholineInfant, Low Birth WeightIntubationIntubation, IntratrachealLeukomalacia, PeriventricularPhosphatidylcholinesSeverity of Illness IndexDisease Models, AnimalHemodynamicsEmbolism, FatAir PressureNeuromuscular Blocking AgentsVentilator Weaning