Pulmonary EmphysemaEmphysemaLungSubcutaneous EmphysemaMediastinal EmphysemaLung DiseasesLung Neoplasmsalpha 1-Antitrypsin DeficiencyPancreatic ElastaseLung InjuryLung Volume MeasurementsLung TransplantationPneumonectomyPulmonary Disease, Chronic ObstructiveRespiratory Function TestsTotal Lung CapacityCarcinoma, Non-Small-Cell LungPulmonary AlveoliTomography, X-Ray ComputedSmokingSmokeForced Expiratory VolumeMatrix Metalloproteinase 12Acute Lung Injuryalpha 1-AntitrypsinPulmonary FibrosisBronchoalveolar Lavage FluidHeliumPulmonary Diffusing CapacityVital CapacityLung Diseases, InterstitialResidual VolumeSpirometryBronchitis