Pulmonary Disease, Chronic ObstructiveAsthmaLung Diseases, ObstructiveSleep Apnea, ObstructiveForced Expiratory VolumeBronchodilator AgentsSpirometryRespiratory Function TestsVital CapacityAdministration, InhalationDyspneaLungJaundice, ObstructiveSeverity of Illness IndexPulmonary EmphysemaAnti-Asthmatic AgentsSmokingAdrenal Cortex HormonesScopolamine DerivativesAlbuterolOxygen Inhalation TherapySputumBronchitisBronchiPolysomnographyExercise ToleranceIpratropiumCholinergic AntagonistsAirway ObstructionEmphysemaPulmonary MedicineQuality of LifePeak Expiratory Flow RateNebulizers and VaporizersTreatment OutcomeAdrenergic beta-2 Receptor AgonistsRespiratory MusclesRisk FactorsBronchitis, ChronicCase-Control StudiesRespiratory InsufficiencyQuestionnairesSmokePrevalenceBronchial HyperreactivityAsthma, Exercise-InducedProspective StudiesRespiratory System AgentsRespiratory SoundsRespiratory TherapyAirway ResistanceInspiratory CapacitySleep Apnea SyndromesRespiratory MucosaBudesonideExhalationPositive-Pressure RespirationCross-Sectional StudiesHospitalizationBronchoalveolar Lavage FluidTime FactorsOxygenDouble-Blind MethodChronic DiseaseAirway RemodelingContinuous Positive Airway PressureRespiratory SystemHypercapniaMetered Dose InhalersAdrenergic beta-AgonistsRespiratory MechanicsInhalationAsthma, OccupationalCoughPneumoniaLung DiseasesExpectorantsGlucocorticoidsalpha 1-Antitrypsin DeficiencyBlood Gas AnalysisRetrospective StudiesExercise TestComorbidityPulmonary VentilationEthanolaminesCohort StudiesMethacholine ChlorideBreathing ExercisesAllergensAnti-Inflammatory AgentsAcute DiseaseHypersensitivityBreath TestsBronchoconstrictionRespirationFollow-Up StudiesLung Volume MeasurementsRespiratory Tract DiseasesHeliumDisease Progression