The Epidemiology, Clinical features and Natural History of Emphysema; The National Emphysema Treatment Trial (NETT); 'Rationale and Experience for Staged Lung Volume Reduction Surgery' Rationale and Experience for Staged Lung Volume Reduction Surgery; Lung Volume Reduction Surgery for Non-Heterogenous Emphysema; Lung Volume Reduction Surgery for Alpha-1-Antripsin Emphysema; Concomitant Lung Cancer Resection and Lung Volume Reduction Surgery; Concomitant Cardiac Surgery and Lung Volume Reduction Surgery; Decision Making in the Management of Secondary Pneumothorax in Patients with Severe Emphysema; Intraoperative and Postoperative Management of Pulmonary Alveolar Air Leaks in Thoracic Surgery; Airway Bypass Treatment of Severe Homogenous Emphysema; Treatment of Heterogenous Emphysema Using The Spiration IBV Intrabronchial Valves; Treatment of Heterogenous Emphysema Using The Emphasys Zephyr EBV Endobronchial Valves; Update on Donor Assessment, Resuscitation and Acceptance Criteria; Update on Lung Transplantation for End Stage Emphysema