Seohee Choi1,2, Woo Jin Hyung3,4. 1. Department of Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea. 2. Gastric Cancer Center, Yonsei Cancer Center, Yonsei University Health System, Seoul, Republic of Korea. 3. Department of Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea. wjhyung@yuhs.ac. 4. Gastric Cancer Center, Yonsei Cancer Center, Yonsei University Health System, Seoul, Republic of Korea. wjhyung@yuhs.ac.