1. Department of Oncology, Asan Medical Center University of Ulsan College of Medicine Seoul South Korea
2. Department of Hemato‐oncology Yeungnam University Hospital Daegu South Korea
3. Department of Gastrointestinal Medical Oncology Peking University School of Oncology, Beijing Cancer Hospital and Institute Beijing China
4. Department of Oncology National Taiwan University Hospital; and Graduate Institute of Oncology, National Taiwan University College of Medicine Taipei Taiwan
5. Division of Medical Oncology, Department of Internal Medicine, Seoul St. Mary's Hospital The Catholic University of Korea College of Medicine Seoul South Korea
6. Center for Gastric Cancer Research Institute and Hospital, National Cancer Center Goyang Gyeonggi South Korea
7. Department of Internal Medicine, Korea Cancer Center Hospital Seoul South Korea
8. Division of Hematology/Oncology, Department of Internal Medicine Gachon University Gil Hospital Incheon South Korea
9. Division of Hematology‐Oncology, Department of Internal Medicine Hallym University Medical Center, Hallym University College of Medicine Anyang South Korea
10. Division of Hematology‐Oncology, Department of Medicine, Samsung Medical Center Sungkyunkwan University School Medicine Seoul South Korea
11. Department of Hematology‐Oncology Chonnam National University Hwasun Hospital Gwangju South Korea
12. Division of Hemato‐Oncology, College of Medicine Korea University, Anam Hospital Seoul South Korea
13. Biometric Research Branch, National Cancer Center Goyang Gyeonggi South Korea
14. Department of Pathology, Asan Medical Center University of Ulsan College of Medicine Seoul South Korea