Airway ObstructionLung Diseases, ObstructiveResidual VolumeBetamethasone ValerateBronchitisRespiratory Function TestsVital CapacityForced Expiratory VolumeRespirationAirway ResistanceIntestinal ObstructionAsthmaBronchiUreteral ObstructionLungAirway RemodelingSpirometryRespiratory SystemBronchial HyperreactivityLaryngeal DiseasesBronchiectasisPulmonary Disease, Chronic ObstructiveTracheal StenosisPulmonary EmphysemaNasal ObstructionBronchodilator AgentsRespiratory MucosaBronchoalveolar Lavage FluidBronchial DiseasesCystic FibrosisChronic DiseaseRespiratory HypersensitivityAdministration, InhalationMethacholine ChloridePierre Robin SyndromeDuodenal ObstructionMucusPlethysmography, Whole BodyMaximal Expiratory Flow-Volume CurvesSputumBronchoscopyPulmonary VentilationBronchoconstrictionUrinary Bladder Neck ObstructionUrethral ObstructionTracheal DiseasesBronchial Provocation TestsBronchitis, ChronicGastric Outlet ObstructionRespiratory MechanicsLung DiseasesRespiratory Tract DiseasesTotal Lung CapacityPseudomonas InfectionsTracheaVentricular Outflow ObstructionMycoplasma pulmonisTracheotomyLaryngostenosisKartagener SyndromeIntubation, IntratrachealHeliumLung Volume MeasurementsMucin 5ACLarynxDisease Models, AnimalPeak Expiratory Flow RateSmokingForced Expiratory Flow RatesDyspneaLaryngeal EdemaPneumoniaAlbuterolGoblet CellsMaximal Expiratory Flow RateInflammationPseudomonas aeruginosaFunctional Residual CapacityBreath TestsTracheostomyLacrimal Duct ObstructionEpiglottisTracheal NeoplasmsAerosolsLaryngeal MasksInhalationHorse DiseasesMuscle, SmoothEpithelial CellsOvalbuminCarbon DioxideBronchiolitisHigh-Frequency Jet VentilationCoughBronchial SpasmAirway ManagementRespiratory SoundsPharynxSleep Apnea, ObstructiveTongue Diseases