PneumocytesPulmonary AlveoliLungPulmonary SurfactantsJaagsiekte sheep retrovirusPulmonary Surfactant-Associated Protein APulmonary Surfactant-Associated ProteinsPulmonary Adenomatosis, OvinePlutoniumPulmonary Surfactant-Associated Protein CTanninsLung Diseases, InterstitialProteolipidsRespiratory MucosaAdenocarcinoma, Bronchiolo-AlveolarEpithelial CellsMacrophages, AlveolarMicroscopy, ElectronLung DiseasesPhosphatidylcholinesCells, CulturedLung NeoplasmsEpitheliumImmunohistochemistryHyperplasiaPulmonary FibrosisPneumoniaRats, Sprague-DawleyRats, WistarCytoplasmic GranulesSheepRNA, MessengerTime FactorsDiquatCell LinePulmonary Surfactant-Associated Protein BCollagen Type IIBlood-Air BarrierAntipainPhloretinMicroscopy, ImmunoelectronSevere Acute Respiratory SyndromeParaquatBronchiSARS VirusBicyclo Compounds1,2-DipalmitoylphosphatidylcholineMolecular Sequence DataSpecific Pathogen-Free Organisms