Lung Diseases, InterstitialBronchiectasisLung DiseasesLungPulmonary FibrosisDermatomyositisIdiopathic Pulmonary FibrosisRespiratory Function TestsScleroderma, SystemicAlveolitis, Extrinsic AllergicPolymyositisBronchoalveolar Lavage FluidSarcoidosis, PulmonaryPulmonary Surfactant-Associated Protein CTomography, X-Ray ComputedConnective Tissue DiseasesLung Diseases, ObstructiveVital CapacityLung NeoplasmsHistidine-tRNA LigaseCollagen DiseasesSarcoidosisBronchoalveolar LavagePulmonary Diffusing CapacityLung TransplantationRadiography, ThoracicMyositisPulmonary AlveoliDyspneaRetrospective StudiesBronchographyForced Expiratory VolumeTotal Lung CapacityBronchiolitisCystic FibrosisSputumBiopsyPulmonary Surfactant-Associated Protein BIdiopathic Interstitial PneumoniasCarcinoma, Non-Small-Cell LungSpirometryLung InjuryBronchoscopyLung Volume MeasurementsSeverity of Illness IndexChronic DiseaseMediastinal EmphysemaDisease ProgressionPneumoniaSmokingPulmonary Disease, Chronic ObstructiveAutoantibodiesCryptogenic Organizing PneumoniaBronchiBronchiolitis ObliteransBiological MarkersHypertension, PulmonaryTreatment OutcomePulmonary EmphysemaMacrophages, AlveolarMixed Connective Tissue DiseasePrognosisHemoptysisMucociliary ClearanceCommon Variable ImmunodeficiencyHistiocytosis, Langerhans-CellLactate DehydrogenasesAnti-Inflammatory AgentsPneumoconiosisScleroderma, DiffuseHermanski-Pudlak SyndromeQuinazolinesMucin-1Aspergillosis, Allergic BronchopulmonaryAsbestosisMycoplasmatalesCase-Control StudiesEsophageal pH MonitoringPulmonary Gas ExchangeAcute Lung InjuryPulmonary EosinophiliaBleomycinMeningeal CarcinomatosisImmunosuppressive AgentsPulmonary Alveolar ProteinosisFarmer's LungPulmonary SurfactantsPulmonary Surfactant-Associated Protein DBirt-Hogg-Dube SyndromeCiliary Motility DisordersPulmonary MedicineKartagener SyndromeRespiratory InsufficiencyBronchitisArthritis, RheumatoidCystitis, InterstitialFatal OutcomeMucusThoracic Surgery, Video-AssistedLymphangioleiomyomatosis