Respiratory Distress Syndrome, AdultFetal Organ MaturityRespiratory Distress Syndrome, NewbornAmniotic FluidLungPulmonary SurfactantsHyaline Membrane DiseaseInfant, NewbornRespiration, ArtificialSphingomyelinsAcute Lung InjuryPositive-Pressure RespirationFetusSyndromeBarotraumaGestational AgePregnancyTidal VolumePrenatal DiagnosisProne PositionLung InjuryAmniocentesisHigh-Frequency VentilationInfant, PrematurePulmonary Gas ExchangePhosphatidylglycerolsInfant, Newborn, DiseasesPhosphatidylcholinesLung DiseasesPulmonary Surfactant-Associated Protein BPulmonary AlveoliTerm BirthFluorescence PolarizationLung ComplianceBronchoalveolar Lavage FluidPulmonary EdemaPregnancy in DiabeticsRespiratory Dead SpaceExtracorporeal Membrane OxygenationBlood Gas AnalysisRespiratory MechanicsVentilator-Induced Lung InjuryAnimals, NewbornRespiratory InsufficiencyOxygenInfant, Premature, DiseasesBiological ProductsPhospholipidsBronchopulmonary DysplasiaVentilators, MechanicalIntensive Care UnitsRespiratory AspirationOxygenators, MembraneFatty AlcoholsAPACHEMultiple Organ FailurePneumoniaPulmonary Surfactant-Associated Protein CProspective StudiesPneumothoraxSepsisLung Volume MeasurementsPulmonary Surfactant-Associated ProteinsTreatment OutcomeExtravascular Lung WaterFatal OutcomeChromatography, Thin LayerCritical CarePulmonary AtelectasisPartial PressurePulmonary Surfactant-Associated Protein ARadiography, ThoracicIntensive CareIntensive Care, NeonatalIntensive Care Units, NeonatalPulmonary CirculationRetrospective StudiesAdministration, InhalationBetamethasoneLung NeoplasmsSurface TensionAcute DiseaseCritical IllnessRespiratory Function TestsTime FactorsRisk FactorsOxygen Inhalation TherapyProteolipidsAdrenal Cortex HormonesSmoke Inhalation InjuryTuberculosis, MiliaryBronchoalveolar LavagePneumonia, AspirationInfant, Very Low Birth WeightInfant, Low Birth WeightDown SyndromeIntubationHemodynamicsSheepSeverity of Illness Index