1. Department of Surgery, College of Medicine, Seoul National University.
2. Department of Surgery, DongKang Medical Center.
3. Department of Surgery, Pusan National University.
4. Department of Surgery, Dong-A University.
5. Department of Surgery, Ulsan University.
6. National Cancer Center.
7. 7Department of Surgery, Ewha Woman's University.
8. Department of Surgery, Gangneung Asan Hospital.
9. Department of Surgery, The Catholic University of Korea.
10. Department of Surgery, Pochon CHA University.
11. Department of Surgery, Kyungpook National University.
12. Department of Surgery, Chonnam National University.
13. Department of Surgery, Keimyung University.
14. Department of Surgery, Chosun University.
15. Department of Surgery, Dankook University.
16. Department of Surgery, Hanyang University.
17. Department of Surgery, Kyung Hee University.
18. Department of Surgery, Changwon Fatima Hospital.
19. Department of Surgery, Hallym University.
20. Department of Surgery, Gyeongsang National University.
21. Department of Surgery, Gachon Medical School.
22. Department of Surgery, Daegu Catholic University.
23. Department of Surgery, Soonchunhyang University.
24. Department of Surgery, Yonsei University.
25. Department of Surgery, Ajou University.
26. Department of Surgery, Hansol Hospital.
27. Department of Surgery, Inha University.
28. Department of Surgery, Eulji University.