1. Division of Gastroenterology and Hepatology; Vanderbilt University Medical Center; Nashville Tennessee
2. The Dr. Henry D. Janowitz Division of Gastroenterology, Icahn School of Medicine at Mount Sinai; New York City New York
3. Division of Gastroenterology; Massachusetts General Hospital and Harvard Medical School; Boston Massachusetts
4. School of Pharmacy; Kaohsiung Medical University, and Department of Medical Research, Kaohsiung Medical University Hospital; Kaohsiung Taiwan
5. Department of Preventive Medicine, College of Medicine; Korea University; Seoul Republic of Korea
6. Department of Medicine and Therapeutics, State Key Laboratory of Digestive Disease; Institute of Digestive Disease, LKS Institute of Health Science, The Chinese University of Hong Kong; Shatin Hong Kong
7. Department of Gastroenterology; North Zealand University Hospital; Frederikssund Denmark