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