Lung Diseases, InterstitialPulmonary FibrosisLung DiseasesLungDermatomyositisIdiopathic Pulmonary FibrosisScleroderma, SystemicPolymyositisAlveolitis, Extrinsic AllergicSarcoidosis, PulmonaryRespiratory Function TestsPulmonary Surfactant-Associated Protein CBronchoalveolar Lavage FluidConnective Tissue DiseasesHistidine-tRNA LigaseCollagen DiseasesSarcoidosisMyositisTomography, X-Ray ComputedPulmonary Diffusing CapacityBronchoalveolar LavageVital CapacityRadiography, ThoracicPulmonary AlveoliLung NeoplasmsDyspneaBiopsyPulmonary Surfactant-Associated Protein BIdiopathic Interstitial PneumoniasLung TransplantationTotal Lung CapacityRetrospective StudiesBronchiolitisLung Diseases, ObstructiveMediastinal EmphysemaAutoantibodiesCryptogenic Organizing PneumoniaSeverity of Illness IndexMixed Connective Tissue DiseaseDisease ProgressionLung Volume MeasurementsHypertension, PulmonaryBiological MarkersLactate DehydrogenasesSmokingCarcinoma, Non-Small-Cell LungHistiocytosis, Langerhans-CellSpirometryMycoplasmatalesScleroderma, DiffuseMucin-1QuinazolinesBronchoscopyMeningeal CarcinomatosisChronic DiseaseMacrophages, AlveolarImmunosuppressive AgentsBronchiolitis ObliteransHermanski-Pudlak SyndromeBirt-Hogg-Dube SyndromePrognosisCystitis, InterstitialTreatment OutcomePulmonary EosinophiliaPneumoniaAsbestosisPulmonary Surfactant-Associated Protein DForced Expiratory VolumePulmonary Alveolar ProteinosisPneumoconiosisBleomycinPulmonary MedicinePulmonary Gas ExchangeInterstitial Cells of CajalLung InjuryAnti-Inflammatory AgentsArthritis, RheumatoidFatal OutcomePrednisolonePulmonary Disease, Chronic ObstructiveThoracic Surgery, Video-AssistedNew MexicoRespiratory InsufficiencyPulmonary SurfactantsHydroxychloroquineTechnetium Tc 99m PentetateAntibodies, AntinuclearEsophageal pH MonitoringCase-Control StudiesPleural DiseasesLymphangioleiomyomatosisJapanBird Fancier's LungRadiographic Image Interpretation, Computer-AssistedAntirheumatic AgentsCyclophosphamidePulmonary EmphysemaSensitivity and Specificity