1. Division of Medical Oncology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
2. Department of Pathology, Yonsei University College of Medicine, Seoul, Republic of Korea
3. Department of Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea
4. Division of Gastroenterology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
5. Department of Radiation Oncology, Yonsei University College of Medicine, Seoul, Republic of Korea
6. Department of Radiology, Yonsei University College of Medicine, Seoul, Republic of Korea