AsthmaAnti-Asthmatic AgentsAdministration, InhalationBronchodilator AgentsAdrenal Cortex HormonesLeukotriene AntagonistsAlbuterolBudesonidePeak Expiratory Flow RateAdrenergic beta-AgonistsEthanolaminesNebulizers and VaporizersForced Expiratory VolumeBronchial HyperreactivityGlucocorticoidsPractice Guidelines as TopicGuideline AdherenceRespiratory Function TestsMedication AdherenceSeverity of Illness IndexAndrostadienesPatient ComplianceQuestionnairesAnti-Inflammatory AgentsTreatment OutcomeDouble-Blind MethodLungAsthma, Exercise-InducedQuality of LifeCross-Sectional StudiesAsthma, OccupationalRespiratory SoundsUnited StatesAllergensHypersensitivityHypersensitivity, ImmediateRhinitisMethacholine ChlorideRhinitis, Allergic, PerennialSpirometryEosinophilsBeclomethasoneBronchiSkin TestsPrevalenceStatus AsthmaticusBronchoconstrictor AgentsAirway RemodelingBronchoconstrictionBronchitisRespiratory HypersensitivityOvalbuminPyroglyphidaePulmonary MedicineVital CapacityAsthma, Aspirin-InducedSputumBronchoalveolar Lavage FluidExhalationAirway ObstructionCoughAir Pollution, IndoorOccupational DiseasesEosinophiliaMitesRisk FactorsEnvironmental ExposureAir PollutantsBreath TestsNedocromilSelf CareAirway ResistanceMetered Dose InhalersInterleukin-13Respiratory SystemCromolyn SodiumTh2 CellsNitrogen DioxidePatient Education as TopicCase-Control StudiesTobacco Smoke PollutionEmergency Service, HospitalPicornaviridae InfectionsCockroachesHospitalizationToluene 2,4-DiisocyanatePulmonary Disease, Chronic Obstructive