1. Department of Radiology and
2. Department of Radiology, Seoul National University Bundang Hospital, Seongnam-si, South Korea;
3. Department of Radiology, Seoul National University Hospital, Seoul, Korea;
4. Department of Thoracic and Cardiovascular Surgery and
5. Seoul National University Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea;
6. Department of Pathology, Seoul National University Hospital and College of Medicine, Seoul, Korea; and
7. Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Korea