26 Division of Gastroenterology and Hepatology, Internal Medicine Department, Faculty of Medicine, Gadjah Mada University, Sardjito General Hospital, Yogyakarta, Indonesia.25 Cochin Hospital, Gastroenterology Department, Paris, France.24 University of British Columbia, Department of Medicine, Kelowna, Canada.23 Chiba University, Gastroenterology Department, Chiba, Japan.22 Gastroenterology Department, Endoscopy Unit, Complejo Hospitalario de Navarra, Pamplona, Spain.21 VU University Medical Center, Department of Gastroenterology, Amsterdam, The Netherlands.20 Mayo Clinic, Scottsdale, Arizona, United States.19 University Medical Center, Interventional Endoscopy Center, Medizinische Klinik und Poliklinik, Mainz, Germany.18 Lund University Surgery, Department of Gastrointestinal Surgery, Malmö, Sweden.17 Division of Gastroenterology and Hepatology, University of Virginia, Charlottesville, Virginia, United States.16 University of Minnesota, Division of Gastroenterology, Minneapolis, Minnesota, United States.15 University of Florida, Gainesville, Florida, United States.of Gastroenterology, Portsmouth, United Kingdom. 14 Portsmouth University Hospital, Dept.13 University of Roehampton, London, United Kingdom.12 Division of Gastroenterology and Hepatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan.11 University Hospital North Tees NHS, Department of Gastroenterology, Stockton-on-Tees, United Kingdom Population Health Sciences Institute, Faculty of Medical Sciences, Newcastle University, Newcastle, United Kingdom.