Affiliation: | Digestive Diseases Center University Hospitals of Leicester Leicester, United Kingdom; Department of Gastroenterology Royal Wolverhampton Hospitals West Midlands, United Kingdom; Department of Pathology Dahiyat el-Amir Rashid Amman, Jordan; Department of Clinical Pharmacology University of Oxford, Oxford, United Kingdom; Department of Surgery Queen Elizabeth Hospital Birmingham, United Kingdom; Department of Epidemiology and Public Health University of Leicester, Leicester, United Kingdom; GI Section Southern Arizona VA Health Care System & Arizona Health, Sciences Center, Tucson, Arizona; University of Sydney and Nepean Hospital New South Wales, Australia Mayo Clinic College of Medicine, Rochester, Minnesota; and Department of Medicine Division of Gastroenterology McMaster University Medical Center Hamilton, Ontario, Canada |