1. Department of Surgery, Korea Cancer Center Hospital, Seoul, Korea.
2. Department of Surgery, Dongnam Institution of Radiological & Medical Sciences, Busan, Korea.
3. Department of Translational Research, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Seoul, Korea.
4. Department of Pathology, Seoul National University Hospital, Seoul, Korea.
5. Department of Pathology, Korea Cancer Center Hospital, Seoul, Korea.
6. Division of Radiation Cancer Research, Korea Institute of Radiological and Medication Sciences, Seoul, Korea.