1. Department of Surgery, Seoul National University Hospital, Seoul, Korea.
2. Department of Surgery, Taif University, College of Medicine, Taif, Saudi Arabia.
3. Department of Surgery, Gachon University Gil Medical Center, Incheon, Korea.
4. Department of Surgery, Seoul National University College of Medicine, Seoul, Korea.
5. Cancer Research Institute, Seoul National University, Seoul, Korea.
6. Division of Foregut Surgery, Department of Surgery, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea.
7. Department of Surgery, Eulji University, Seoul, Korea.
8. Department of Gastrointestinal Surgery, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
9. Department of Surgery, Al-Noor Specialist Hospital, Makkah, Saudi Arabia.
10. Department of Surgery, Seoul National University Bundang Hospital, Seongnam, Korea.