Idiopathic Interstitial PneumoniasLung Diseases, InterstitialIdiopathic Pulmonary FibrosisCryptogenic Organizing PneumoniaPulmonary FibrosisConnective Tissue DiseasesLungBronchoalveolar LavageInterleukin-13 Receptor alpha1 SubunitBiopsyTomography, X-Ray ComputedPneumoniaBronchoalveolar Lavage FluidRespiratory Function TestsPulmonary Surfactant-Associated Protein CPrognosisRetrospective StudiesRadiography, ThoracicPneumonia, BacterialPneumonia, ViralPulmonary Surfactant-Associated Protein ACollagen DiseasesPneumonia, PneumococcalPneumonia, PneumocystisDermatomyositis