1. Department of Diagnostic Radiology, Research Institute of Radiological Science, Yonsei University College of Medicine, Seoul, Korea.
2. Department of Radiation Oncology, Yonsei University College of Medicine, Seoul, Korea.
3. Department of General Surgery, Yonsei University College of Medicine, Seoul, Korea.
4. Department of Diagnostic Pathology, Yonsei University College of Medicine, Seoul, Korea.