1. Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
2. Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul, Korea
3. Inflammatory Bowel Disease Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
4. Department of Internal Medicine and Institute of Gastroenterology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
5. Division of Gastroenterology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
6. Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
7. Center for Crohn’s and Colitis, Department of Gastroenterology, College of Medicine, Kyung Hee University, Seoul, Korea
8. Division of Gastroenterology, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
9. Digestive Diseases Research Center, University of Ulsan College of Medicine, Seoul, Korea