1. Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine; College of Medicine, The Catholic University of Korea; Seoul South Korea
2. Department of Thoracic and Cardiovascular Surgery; College of Medicine, The Catholic University of Korea; Seoul South Korea
3. Division of Hematology-Oncology, Department of Internal Medicine; College of Medicine, The Catholic University of Korea; Seoul South Korea
4. Department of Radiology; College of Medicine, The Catholic University of Korea; Seoul South Korea
5. Department of Hospital Pathology; Yeouido St. Mary Hospital, College of Medicine, The Catholic University of Korea; Seoul South Korea