1. Department of Pathology, Sejong General Hospital, Puchon, Korea.
2. Department of Radiology, Sejong General Hospital, Puchon, Korea.
3. Department of Pediatrics, Sejong General Hospital, Puchon, Korea.
4. Department of Thoracic and Cardiovascular Surgery, Sejong General Hospital, Puchon, Korea.
5. Department of Pathology, Korea University College of Medicine, Seoul, Korea.