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AsthmaCanadaSensitivity and SpecificityAnti-Asthmatic AgentsAsthma, Exercise-InducedAdministration, InhalationPeak Expiratory Flow RateForced Expiratory VolumeAsthma, OccupationalBronchodilator AgentsBronchial HyperreactivityRespiratory SoundsAllergensAdrenal Cortex HormonesHypersensitivityOntarioQuestionnairesPrevalenceHypersensitivity, ImmediateRespiratory Function TestsSeverity of Illness IndexReproducibility of ResultsRhinitisMethacholine ChlorideTime FactorsAlbuterolRisk FactorsContrast SensitivityRhinitis, Allergic, PerennialCross-Sectional StudiesSpirometrySkin TestsAlbertaBronchiBudesonideLungBritish ColumbiaEosinophilsBeclomethasoneProspective StudiesLeukotriene AntagonistsNebulizers and VaporizersPredictive Value of TestsBronchoconstrictor AgentsManitobaPractice Guidelines as TopicTreatment OutcomeCohort StudiesHealth SurveysQuebecAdrenergic beta-AgonistsStatus AsthmaticusBronchoconstrictionAirway RemodelingBronchitisCase-Control StudiesNova ScotiaSputumRespiratory HypersensitivityAge FactorsArctic RegionsEmergency Service, HospitalOvalbuminRetrospective StudiesPulmonary MedicineGlucocorticoidsROC CurvePyroglyphidaeEnvironmental ExposureOccupational DiseasesCoughDose-Response Relationship, DrugLogistic ModelsChronic DiseaseVital CapacityUnited StatesHospitalizationDouble-Blind MethodQuality of LifeBronchoalveolar Lavage FluidInuitsAsthma, Aspirin-InducedAmerican Native Continental Ancestry GroupPatient Education as TopicFollow-Up StudiesSex FactorsInfant, NewbornMutationIndians, North AmericanAir PollutantsExhalationSmokingBreath TestsNorthwest TerritoriesAnti-Inflammatory AgentsInsulin ResistanceAirway ObstructionPolymerase Chain ReactionAir Pollution, IndoorMites