1 Department of Surgery, Gyeongsang National University Changwon Hospital, Changwon, Korea.
2 Division of Medical Oncology, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
3 Department of Internal Medicine, Seoul National University Hospital Healthcare System Gangnam Center Seoul, Seoul, Korea.
4 National Evidence-based Healthcare Collaborating Agency (NECA), Seoul, Korea.
5 Department of Pathology, Korea University Guro Hospital, Seoul, Korea.
6 Center for Gastric Cancer, National Cancer Center, Goyang, Korea.
7 Division of Hematology-Oncology, Department of Internal Medicine, Hallym University Medical Center, Hallym University College of Medicine, Anyang, Korea.
8 Department of Medicine, Samsung Medical Center, Seoul, Korea.
9 Department of Surgery, Pusan National University Hospital, Busan, Korea.
10 Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
11 Department of Internal Medicine, Ewha Womans University College of Medicine, Seoul, Korea.
12 Division of Gastrointestinal Surgery, Department of Surgery, Asan Medical Center and University of Ulsan College of Medicine, Seoul, Korea.
13 Department of Surgery, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
14 Department of Nuclear Medicine, Severance Hospital, Seoul, Korea.
15 Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea.
16 Department of Surgery, Soonchunhyang University, Cheonan, Korea.
17 Department of Hematology and Oncology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.
18 Department of Surgery, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, Korea.
19 Department of Gastroenterology, Hallym University Sacred Heart Hospital, University of Hallym College of Medicine, Anyang, Korea.
20 Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
21 Division of Hematology-Oncology, Department of Internal Medicine, Pusan National University Yangsan Hospital, Yangsan, Korea.
22 Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University, School of Medicine, Seoul, Korea.
23 Department of Nuclear Medicine, Catholic Kwandong University, College of Medicine, Incheon, Korea.
24 Department of Surgery, Kyungpook National University Chilgok Hospital, School of Medicine, Kyungpook National University, Daegu, Korea.
25 Division of Oncology, Department of Internal Medicine, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea.
26 Department of Radiology, Samsung Medical Center, Sungkyunkwan University, Seoul, Korea.
27 Division of Medical Oncology, Yonsei Cancer Center, Yonsei University Health System, Seoul, Korea.
28 Department of Surgery, Chonnam National University Medical School, Gwangju, Korea.
29 Department of Surgery, Ajou University School of Medicine, Suwon, Korea.
30 Department of Surgery, Korea University Anam Hospital, Seoul, Korea.
31 Department of Radiology, National Cancer Center, Goyang, Korea.
32 Department of Hospital Pathology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
33 Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea.
34 Division of Hematology-Oncology, Department of Internal Medicine, Chonnam National University Medical School and Hwasun Hospital, Hwasun, Korea.
35 Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea.
36 Department of Surgery, Dankook University Hospital, Cheonan, Korea.
37 Department of Surgery, Severance Hospital, Seoul, Korea.
38 Department of Pathology, Seoul National University Hospital, Seoul, Korea.
39 Department of Surgery, Seoul National University Bundang Hospital, Seongnam, Korea.
40 Department of Internal Medicine, Chungbuk National University Hospital, Chungbuk National University College of Medicine, Cheongju, Korea.
41 Department of Internal Medicine, Kyungpook National University Chilgok Hospital, School of Medicine, Kyungpook National University, Daegu, Korea.
42 Department of Surgery, Seoul National University Hospital and Seoul National University College of Medicine Cancer Research Institute,, Seoul, Korea.