AerosolsAlbuterolNebulizers and VaporizersBronchodilator AgentsAdministration, InhalationIpratropiumAerosol PropellantsMetered Dose InhalersInhalation SpacersAdrenergic beta-2 Receptor AgonistsRacepinephrineAdrenergic beta-AgonistsBronchial SpasmAsthmaChlorofluorocarbonsOzone DepletionAir MicrobiologyBronchoconstrictionParticle SizeEquipment DesignBeclomethasoneForced Expiratory VolumeRespiratory Therapy Department, HospitalLungAnti-Asthmatic AgentsForced Expiratory Flow RatesDouble-Blind MethodBronchiolitisMasksDrug IncompatibilityRespiratory TherapyReceptors, Adrenergic, beta-2Airway ResistanceModels, AnatomicAcid RainBronchial Provocation TestsManikinsInhalation ExposureAtmosphereHumidityRespiratory Function TestsDrug Administration ScheduleEquipment SafetyBudesonidePulmonary Disease, Chronic ObstructiveTreatment OutcomeAir MovementsHydrocarbons, FluorinatedMyasthenic Syndromes, CongenitalStereoisomerismTime FactorsBronchiDrug CombinationsIntubation, IntratrachealPeak Expiratory Flow RatePowdersTracheaSulfuric AcidsDrug Delivery SystemsRespiratory MechanicsPropanolaminesTechnetium Tc 99m PentetateLethal Dose 50Air Pollutants, OccupationalRespiration, ArtificialGlucocorticoidsOvalbuminSmogEnvironmental MonitoringBronchial HyperreactivityVital CapacityDrug Therapy, CombinationAndrostadienesSpirometryAir PollutantsMissouriRadiation DosageAdrenal Cortex HormonesNasal SpraysRespiratory Protective DevicesAnesthesia, InhalationPlacebosRespiratory SoundsPlethysmographyAdministration, OralDisease Models, AnimalFiltrationMaterials TestingMeteorologyMice, Inbred BALB CParticulate MatterVentilation