SputumPulmonary Disease, Chronic ObstructiveAsthmaForced Expiratory VolumeBronchitisBronchodilator AgentsCystic FibrosisBronchiectasisAdrenal Cortex HormonesBronchitis, ChronicAdministration, InhalationExpectorantsAcute DiseaseAnti-Asthmatic AgentsPicornaviridae InfectionsRespiratory Function TestsTuberculosis, PulmonaryDisease ProgressionSeverity of Illness IndexRhinovirusRespiratory Tract InfectionsLung Diseases, ObstructiveAlbuterolScopolamine DerivativesVital CapacitySpirometryEosinophilsPeak Expiratory Flow RateCoughBudesonideLungTreatment OutcomeAnti-Bacterial AgentsDyspneaMycobacterium tuberculosisProspective StudiesCholinergic AntagonistsDouble-Blind MethodNebulizers and VaporizersHospitalizationStatus AsthmaticusSpecimen HandlingEosinophil Granule ProteinsSuppurationChronic DiseasePseudomonas InfectionsBiological MarkersSaline Solution, HypertonicGlucocorticoidsVirus DiseasesAndrostadienesLeukocyte CountAnti-Inflammatory AgentsTime FactorsBacterial InfectionsCommon ColdAntitubercular AgentsPneumoniaBronchiPulmonary MedicineBacteriological TechniquesDrug Therapy, CombinationBronchoscopyPseudomonas aeruginosaInhalation SpacersQuality of LifeEthanolaminesEosinophiliaBronchoalveolar Lavage FluidBreath TestsIdiopathic Pulmonary FibrosisRetrospective StudiesRespiratory TherapyAdrenergic beta-2 Receptor AgonistsLeukocyte ElastaseRecurrenceAdrenergic beta-AgonistsNeutrophilsExhalationSensitivity and SpecificityAzithromycinSmokingMetered Dose InhalersInflammationInterleukin-8Lung DiseasesBronchial HyperreactivityRespiratory SystemMucusBronchial Provocation TestsRespiratory System AgentsBeclomethasonePrednisoloneNasal LavageMucociliary ClearancePneumonia, BacterialEosinophil Cationic ProteinRespiratory InsufficiencyOxygen Inhalation TherapyRisk Factors