1. Division of Medical Oncology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
2. Department of Pathology, Konkuk University School of Medicine, Konkuk University Medical Center, Seoul, Korea
3. Department of Pathology, Yonsei University College of Medicine, Seoul, Korea
4. Department of Thoracic and Cardiovascular Surgery, Yonsei University College of Medicine, Seoul, Korea
5. Department of Radiation Oncology, Yonsei University College of Medicine, Seoul, Korea
6. Department of Radiology, Yonsei University College of Medicine, Seoul, Korea
7. Division of Gastroenterology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
8. Department of Thoracic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
9. Abbott Molecular Laboratories, Des Plaines, IL, United States
10. Department of Pathology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea