1. Division of Gastroenterology and Hepatology; Mayo Clinic College of Medicine; Rochester MN, USA
2. Department of Internal Medicine; University of Minnesota; Minneapolis MN, USA
3. Department of Medicine; Mount Sinai Roosevelt Hospital; New York NY
4. Department of Biomedical Statistics and Informatics; Mayo Clinic College of Medicine; Rochester MN, USA
5. Division of Epidemiology, Department of Health Sciences Research; Mayo Clinic; Rochester MN, USA
6. Department of Medicine, Faculty of Medicine; Chulalongkorn University and King Chulalongkorn Memorial Hospital; Thai Red Cross Society Bangkok Thailand