1. Department of Internal Medicine, The Catholic University of Korea College of Medicine, Korea
2. Division of Pulmonology, Department of Internal Medicine, The Catholic University of Korea College of Medicine, Seoul St. Mary's Hospital, Korea
3. Department of Radiology, The Catholic University of Korea College of Medicine, Seoul St. Mary's Hospital, Korea
4. Department of Thoracic Surgery, The Catholic University of Korea College of Medicine, Seoul St. Mary's Hospital, Korea
5. Department of Nuclear Medicine, The Catholic University of Korea College of Medicine, Seoul St. Mary's Hospital, Korea