Pulmonary EmphysemaEmphysemaSubcutaneous EmphysemaMediastinal Emphysemaalpha 1-Antitrypsin DeficiencyPancreatic ElastaseLungPulmonary Disease, Chronic ObstructivePneumonectomyRespiratory Function TestsTomography, X-Ray ComputedSmokeSmokingMatrix Metalloproteinase 12alpha 1-AntitrypsinTotal Lung CapacityForced Expiratory VolumePulmonary AlveoliLung Volume MeasurementsHeliumPulmonary Diffusing CapacityResidual VolumeVital CapacitySpirometryBronchitisPulmonary Heart DiseaseBronchitis, ChronicAirway ObstructionElastinPulmonary FibrosisBronchoalveolar Lavage FluidBronchographyRadiography, ThoracicLung ComplianceBronchoscopyDyspneaCoal MiningSeverity of Illness IndexLeukocyte ElastaseLung Diseases, ObstructiveLung DiseasesRespiratory MechanicsDiaphragmPneumoconiosisRadiographic Image Interpretation, Computer-AssistedPneumopericardiumDesmosinePneumoniaTobaccoDisease Models, AnimalFunctional Residual CapacityPulmonary Surfactant-Associated Protein DSpiritualismBronchiolesExercise ToleranceAirway ResistanceSerpin E2Macrophages, AlveolarPhenotypeOrbital DiseasesMice, Inbred C57BLPapainBronchiBronchoalveolar Lavage