1. Department of Surgery; Yonsei University College of Medicine; Seoul Korea
2. Organ Transplantation Center; Severance Hospital; Yonsei University Health System; Seoul Korea
3. Department of Surgery; Ewha Womans University College of Medicine; Seoul Korea
4. Division of Pulmonology; Department of Internal Medicine; Yonsei University College of Medicine; Seoul Korea
5. Department of Thoracic and Cardiovascular Surgery; College of Medicine; Yonsei University; Seoul Korea