1. Department of Surgery, Seoul National University Hospital, Seoul, South Korea
2. Department of Surgery, Kaizuka City Hospital, Kaizuka, Osaka, Japan
3. Japan Clinical Oncology Group Operations Office, National Cancer Center, Tokyo, Japan
4. National Cancer Center, Goyang, South Korea
5. Division of Gastric Surgery, Shizuoka Cancer Center, Nagaizumi, Japan
6. Ajou University School of Medicine, Suwon, South Korea
7. Komagome Tokyo Metropolitan Hospital, Tokyo, Japan
8. Department of Surgery, Yonsei University College of Medicine, Seoul, South Korea
9. Hakodate Goryokaku Hospital, Hakodate, Japan
10. Seoul National University College of Medicine, Seoul, South Korea
11. Osaka Prefectural General Medical Center, Osaka-Shi, Japan
12. Hyogo College of Medicine, Nishinomiya, Japan