1. Department of Gastrointestinal Surgery, West China Hospital, Sichuan University, Chengdu, China
2. Laboratory of Gastric Cancer, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
3. Department of Surgery, Severance Hospital, Yonsei University Health System, Yonsei University College of Medicine, Seoul, Republic of Korea
4. Robot and Minimal Invasive Surgery Center, Severance Hospital, Yonsei University Health System, Seoul, Republic of Korea
5. Biostatistics Collaboration Unit, Yonsei University College of Medicine, Seoul, Republic of Korea