Lung Diseases, InterstitialLung DiseasesLungPulmonary FibrosisDermatomyositisIdiopathic Pulmonary FibrosisScleroderma, SystemicAlveolitis, Extrinsic AllergicPolymyositisRespiratory Function TestsBronchoalveolar Lavage FluidSarcoidosis, PulmonaryPulmonary Surfactant-Associated Protein CConnective Tissue DiseasesAnatomyTomography, X-Ray ComputedLung Diseases, ObstructiveLung NeoplasmsHistidine-tRNA LigaseCollagen DiseasesSarcoidosisBronchoalveolar LavagePulmonary Diffusing CapacityMyositisVital CapacityLung TransplantationRadiography, ThoracicPulmonary AlveoliDyspneaTotal Lung CapacityPulmonary Surfactant-Associated Protein BBiopsyRetrospective StudiesIdiopathic Interstitial PneumoniasCarcinoma, Non-Small-Cell LungLung InjuryBronchiolitisLung Volume MeasurementsMediastinal EmphysemaSpirometrySeverity of Illness IndexAutoantibodiesCryptogenic Organizing PneumoniaSmokingHypertension, PulmonaryDisease ProgressionChronic DiseaseForced Expiratory VolumePneumoniaPulmonary Disease, Chronic ObstructiveBiological MarkersMixed Connective Tissue DiseaseBronchoscopyMacrophages, AlveolarBronchiolitis ObliteransCystic FibrosisTreatment OutcomeHistiocytosis, Langerhans-CellLactate DehydrogenasesPrognosisPneumoconiosisScleroderma, DiffuseHermanski-Pudlak SyndromeQuinazolinesMucin-1AsbestosisMycoplasmatalesPulmonary Gas ExchangePulmonary EmphysemaAcute Lung InjuryPulmonary EosinophiliaBleomycinMeningeal CarcinomatosisImmunosuppressive AgentsPulmonary Alveolar ProteinosisFarmer's LungPulmonary SurfactantsPulmonary Surfactant-Associated Protein DBirt-Hogg-Dube SyndromePulmonary MedicineRespiratory InsufficiencyAnti-Inflammatory AgentsCase-Control StudiesFatal OutcomeCystitis, InterstitialThoracic Surgery, Video-AssistedBronchiLymphangioleiomyomatosisPleural DiseasesPrednisoloneArthritis, RheumatoidSensitivity and SpecificityTechnetium Tc 99m PentetateNew MexicoInterstitial Cells of CajalRadiographic Image Interpretation, Computer-AssistedAntibodies, AntinuclearOxygenHydroxychloroquineEsophageal pH Monitoring