1. Department of Surgery, Graduate School, Yonsei University College of Medicine, Seoul, Korea.
2. Department of Surgery, Soonchunhyang University College of Medicine, Bucheon, Korea.
3. Exercise Physiology Laboratory, Kookmin University, Seoul, Korea.
4. Medi Plus Solution, Seoul, Korea.
5. Department of Biostatistics, Yonsei University College of Medicine, Seoul, Korea.
6. Department of Surgery, Yonsei University College of Medicine, Seoul, Korea.
7. Gastric Cancer Center, Yonsei Cancer Center, Yonsei University Health System, Seoul, Korea.
8. Sports, Health, and Rehabilitation Major, Kookmin University, Seoul, Korea.
9. Robot and MIS Center, Severance Hospital, Yonsei University Health System, Seoul, Korea.