1. Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.
2. The Third Department of Internal Medicine, Kyorin University School of Medicine, Tokyo, Japan.
3. Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.
4. Department of Medicine and Therapeutics, Institute of Digestive Disease, LKS Institute of Health Science, State Key Laboratory of Digestive Disease, The Chinese University of Hong Kong, Hong Kong, China.
5. Gleneagles Medical Centre and Duke-NUS Medical School, Singapore, Singapore.
6. Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan.
7. Department of Medical Gastroenterology, Asian Institute of Gastroenterology, Hyderabad, India.
8. Department of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
9. Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
10. Department of Internal Medicine, Hanyang University Guri Hospital, Guri, Korea.
11. Department of Internal Medicine, Kyung Hee University School of Medicine, Seoul, Korea.
12. Department of Gastroenterology, Shanghai Jiao Tong University, Shanghai, China.
13. Department of Gastroenterology, Fourth Military Medical University, Xi'an, China.
14. Department of Gastroenterology, Peking Union Medical College, Beijing, China.
15. Department of Gastroenterology and Hepatology, Tokyo Medical and Dental University, Tokyo, Japan.
16. Department of Gastroenterology, Shiga University, Otsu, Japan.
17. Department of Internal Medicine, Toho University, Sakura, Japan.
18. Department of Medicine, Jichi Medical University, Shimotsuke, Japan.
19. Center for Advanced IBD Research and Treatment, Kitasato University, Tokyo, Japan.
20. Department of Gastroenterology, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research, New Delhi, India.
21. Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.