1Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Korea.
10Department of Surgery, Seoul National University School of Medicine, Korea.
11Department of Medicine, Sungkyunkwan University School of Medicine, Korea.
12Department of Surgery, Sungkyunkwan University School of Medicine, Korea.
13Department of Surgery, Yonsei University College of Medicine, Korea.
14Department of Pathology, Yonsei University College of Medicine, Korea.
15Department of Surgery, Yonsei University Wonju College of Medicine, Korea.
16Department of Internal Medicine, University of Ulsan College of Medicine, Korea.
17Department of Surgery, University of Ulsan College of Medicine, Korea.
18Department of Radiology, University of Ulsan College of Medicine, Korea.
19Department of Internal Medicine, Korea Cancer Center Hospital, Korea.
2Department of Radiology, Konkuk University School of Medicine, Korea.
20Department of Internal Medicine, School of Medicine, Eulji University, Korea.
21Department of Internal Medicine, Chonnam National University Medical School, Korea.
22Department of Internal Medicine, Chungnam National University College of Medicine, Korea.
23Department of Surgery, Chungbuk National University College of Medicine, Korea.
24Department of Surgery, Hallym University College of Medicine, Korea.
3Department of Surgery, Korea University College of Medicine, Korea.
4Department of Internal Medicine, Kosin University College of Medicine, Korea.
5National Cancer Center, Korea.
6Department of Radiology, Daerim St. Mary's Hospital, Korea.
7Radiation Health Research Institute, Korea.
8Department of Internal Medicine, Seoul National University School of Medicine, Korea.
9Department of Radiology, Seoul National University School of Medicine, Korea.