1. Department of Radiology, Ewha Womans University College of Medicine, Ewha Womans University Mokdong Hospital, Seoul, Korea.
2. Department of Thoracic and Cardiovascular Surgery, Ewha Womans University College of Medicine, Ewha Womans University Seoul Hospital, Seoul, Korea.
3. Department of Pathology, Ewha Womans University College of Medicine, Ewha Womans University Seoul Hospital, Seoul, Korea.