Oita University, Kindai University - Department of Gastroenterology and Hepatology, Kindai University, Kindai University, Kawasaki Medical School, Kindai University - Department of Gastroenterology and Hepatology, Kindai University - Department of Gastroenterology and Hepatology, Okanami General Hospital, National Center for Global Health and Medicine, Kyushu University, Kyushu University, Fukuoka University Chikushi Hospital, Fukuoka University Chikushi Hospital, Komagome Hospital - Tokyo Metropolitan Cancer and Infectious Diseases Center, Oita University, National Hospital Organization Okayama Medical Centre, Tokyo Women's Medical University, Urawa GIE Clinic Group, Oita University - Department of Gastroenterology, Oita University and JA Onomichi General Hospital

St. Luke's International University - Department of Gastroenterology, Tokyo Shinagawa Hospital - Department of Gastroenterology, Tokyo Medical University - Department of Gastroenterological Endoscopy, Tokyo Metropolitan Bokutoh Hospital - Department of Gastroenterology, The Tazuke Kofukai Medical Research Institute - Kitano Hospital, Department of Gastroenterology and Hepatology, University of Tokyo Graduate School of Medicine - Department of Gastroenterology, Nippon Medical School - Department of Gastroenterology, Hiroshima City Asa Citizens Hospital - Department of Gastroenterology, Saga Medical Center Koseikan - Department of Gastroenterology, St. Marianna University School of Medicine - Division of Gastroenterology and Hepatology, Nara City Hospital - Department of Gastroenterology and Gastroenterology, Nagoya University Hospital - Department of Endoscopy, National Hospital Organization Kyoto Medical Centre - Department of Gastroenterology, Komagome Hospital, Tokyo Metropolitan Cancer and Infectious Diseases Center - Department of Gastroenterology, Oita University - Department of Gastroenterology, Fukuoka University Chikushi Hospital - Department of Gastroenterology, Nippon Medical School - Chiba Hokusoh Hospital, Department of Gastroenterology, Japanese Red Cross Shizuoka Hospital - Department of Gastroenterology, Kawasaki Medical School General Medical Center - Division of Endoscopy and Ultrasonography, Niigata University Graduate School of Medical and Dental Sciences - Division of Gastroenterology, University of Miyazaki Hospital - Department of Gastroenterology and Hepatology, University of Tsukuba - Department of Gastroenterology, Toranomon Hospital - Department of Gastroenterology, Fujita Health University Hospital - Department of Emergency Medicine, Naha City Hospital - Department of Gastroenterology, Tokyo Saiseikai Central Hospital - Department of Internal Medicine, Shuto General Hospital - Department of Gastroenterology, Hirosaki University Hospital - Division of Endoscopy, Kumamoto University - Department of Gastroenterology, National Hospital Organization Medical Center - Department of Gastroenterology and Hepatology, Kyushu University - Department of Medicine and Clinical Science, Fukushima Medical University - Department of Gastroenterology, Iwate Medical University - Division of Gastroenterology, National Defense Medical College - Department of Internal Medicine, Kawasaki Medical School - Division of Endoscopy and Ultrasonography, Suita Municipal Hospital - Department of Gastroenterology and Hepatology, University of the Ryukyus Hospital - Department of Endoscopy, National Hospital Organization Kyushu Medical Center - epartment of Gastroenterology, Fukuoka University Hospital - Department of Gastroenterological Endoscopy, Kitasato University - Department of Gastroenterology, Akita University - Department of Gastroenterology and Neurology, Kagoshima University Graduate School of Medical and Dental Sciences - Digestive and Lifestyle Diseases, Tokyo Medical University - Department of Gastroenterological Endoscopy, National Center for Global Health and Medicine - Department of Gastroenterology and Hepatology, St. Luke's International University - Department of Gastroenterology, St. Luke's International University - Department of Gastroenterology, St. Luke's International University - Department of Gastroenterology, St. Luke's International University - Department of Gastroenterology, St. Luke's International University - Department of Gastroenterology, St. Luke's International Hospital - Department of Gastroenterology and Nippon Medical School - Department of Gastroenterology

affiliation not provided to SSRN, Oita University - Department of Gastroenterology, affiliation not provided to SSRN, affiliation not provided to SSRN, Oita University, Oita University, Oita University, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Oita University, Oita University, Oita University, Oita University, Oita University, affiliation not provided to SSRN, affiliation not provided to SSRN, Oita University and Oita University