1. Immunology Unit, Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
2. Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
3. Department of Internal Medicine, Weiss Memorial Hospital, Chicago, IL 60640, USA
4. Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
5. Division of Endocrinology, Department of Internal Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
6. Clinical Epidemiology and Clinical Statistics Center, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
7. Department of Pharmacotherapy, College of Pharmacy, University of Utah, Salt Lake City, UT 84112, USA
8. IDEAS Center, Veterans Affairs Salt Lake City Healthcare System, Salt Lake City, UT 84108, USA
9. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Mayo Clinic, Rochester, Mayo Clinic Health System, Rochester, MN 55902, USA
10. Division of Gastroenterology and Hepatology, Stanford University School of Medicine, Stanford, CA 94305, USA
11. Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 41809, USA
12. Division of Gastroenterology and Hepatology, Department of Medicine, University of Arizona College of Medicine, Phoenix, AZ 85004, USA
13. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Banner University Medical Center, Phoenix, AZ 85006, USA