1. Department of Pathology, Wonju College of Medicine Yonsei University, Wonju, Korea.
2. The Gastrointestinal Pathology Study Group of Korean Society of Pathologists, Korea.
3. Department of Pathology, Sungkyunkwan University, Seoul, Korea.
4. Department of Pathology, Inha University, Inchon, Korea.
5. Department of Pathology, University of Ulsan, Seoul, Korea.
6. Department of Pathology, Seoul National University, Seoul and Seongnam, Korea.
7. Department of Pathology, Dong-A University, Busan, Korea.
8. Department of Pathology, The Catholic University of Korea, Seoul and Uijeongbu, Korea.
9. Department of Pathology, Soonchunhyang University, Seoul, Korea.
10. Department of Pathology, Chungnam National University, Daejon, Korea.
11. Department of Pathology, Daegu Catholic University, Daegu, Korea.
12. Department of Pathology, Chonbuk National University, Chonju, Korea.
13. Department of Pathology, Chonnam University, Gwangju, Korea.
14. Department of Pathology, Ewha University, Seoul, Korea.
15. Department of Pathology, Ajou Univerisity, Suwon, Korea.
16. Department of Pathology, Yonsei Univeristy, Seoul, Korea.
17. Department of Pathology, Youngnam Univeristy, Daegu, Korea.
18. Department of Pathology, Inje University, Seoul and Busan, Korea.
19. Department of Pathology, National Cancer Center, Goyang, Korea.
20. Department of Pathology, Korea University, Seoul, Korea.
21. Department of Pathology, Busan University, Busan, Korea.
22. Department of Pathology, Kosin University, Busan, Korea.
23. Department of Pathology, Hallym University, Chunchon, Korea.
24. Department of Pathology, Daegu Patima Hospital, Daegu, Korea.
25. Department of Pathology, Kyung Hee University, Seoul, Korea.
26. Department of Pathology, CHA Medical School, Seongnam, Korea.
27. Department of Preventive Medicine, Yonsei University, Wonju College of Medicine, Wonju, Korea.