Sarcoidosis, PulmonarySarcoidosisBronchoalveolar Lavage FluidLung DiseasesGranuloma, Respiratory TractEpithelioid CellsTherapeutic IrrigationPeptidyl-Dipeptidase AGranulomaLungAdrenal Cortex HormonesRespiratory Function TestsBronchoscopyLymphatic DiseasesCD4-CD8 RatioRadiography, ThoracicKveim TestPulmonary FibrosisPrednisolonePulmonary AlveoliBiopsyMacrophages, AlveolarGlucocorticoidsLeukocyte CountLymph NodesSkin DiseasesVital CapacityErythema NodosumTomography, X-Ray ComputedBronchiCell CountPrednisoneCase-Control Studies