AsthmaAcute DiseasePeak Expiratory Flow RateAnti-Asthmatic AgentsStatus AsthmaticusAlbuterolNebulizers and VaporizersBronchodilator AgentsAdministration, InhalationAminophyllineEmergency Service, HospitalForced Expiratory VolumeInhalation SpacersMagnesium SulfateRespiratory Care UnitsIpratropiumAdrenal Cortex HormonesAdrenergic beta-AgonistsSeverity of Illness IndexRespiratory Function TestsSpirometryEmergenciesLightningAirway ObstructionPrednisoloneHospitalizationAsthma, Exercise-InducedBudesonideGlucocorticoidsLeukotriene AntagonistsPicornaviridae InfectionsRhinovirusMethylprednisolone HemisuccinateFenoterolEosinophilsAdrenergic beta-2 Receptor AgonistsSputumDouble-Blind MethodAsthma, OccupationalBronchitisTerbutalineBronchial HyperreactivityRespiratory SoundsTreatment OutcomePatient AdmissionProspective StudiesAllergensEmergency MedicineOximetryMedical AuditAerosolsLungClinical ProtocolsHypersensitivitySelf CareAirway ResistancePatient ReadmissionBreath TestsPractice Guidelines as TopicHypersensitivity, ImmediateAnti-Inflammatory AgentsGuideline AdherencePulmonary VentilationPatient Education as TopicRNA Virus InfectionsRhinitisMethacholine ChlorideDrug Therapy, CombinationMethylprednisoloneRetrospective StudiesRhinitis, Allergic, PerennialDrug Administration RoutesQuestionnairesEmergency Medical ServicesAdministration, OralRespiratory Tract InfectionsStatistics, NonparametricUrban PopulationCohort StudiesLength of StayLeukocyte CountSteroidsBeclomethasoneBronchiFollow-Up StudiesEnglandSkin TestsRisk FactorsFamily PracticeOxygenMedical RecordsPrevalenceBronchoconstrictor AgentsAirway RemodelingDrug Administration ScheduleChlamydophila pneumoniaeBronchoconstrictionTime FactorsHospitals, PublicRecurrence