1 King's College Hospital, London, United Kingdom

2 Kings College Hospital, London, United Kingdom

1 Instituto Nacional do Cancer, Rio de Janeiro, Brazil

2 Hospital Moinhos de Vento, Porto Alegre, Brazil

3 Hospital Moinhos de Vento, Porto Alegre, Brazil|||Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil

1 The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi People's Hospital, Wuxi Medical Center, Nanjing Medical University, Jiangsu Branch of the National Clinical Research Center for Digestive Diseases, Wuxi, China

1 University Hospital Bonn, Bonn, Germany|||University Hospital Bonn, Bonn, Germany

2 University of Bonn, Bonn, Germany

1 Mohammed VI University Hospital,Department of Hepato-Gastroenterology, Oujda, Morocco

1 Showa Medical University Northern Yokohama Hospital Digestive Disease Center, Yokohama, Japan

2 Kudo-Clinic, Akita, Japan

3 Municipal Kakunodate General Hospital, Semboku, Japan

4 Showa Medical University Northern Yokohama Hospital, Yokohama, Japan

1 Kitakyushu Munincipal Medical Center, Kitakyushu-shi, Japan

2 Nippon Medical School Hospital, Bunkyo-ku, Japan

3 Aomori Prefectural Central Hospital, Aomori-shi, Japan

4 Kyushu Medical Center, National Hospital Organization, Fukuoka-shi, Japan

5 Japanese Red Cross Fukui Hospital, Fukui-shi, Japan

6 The University of Tokyo, Bunkyo-ku, Japan

7 Toyota Kosei Hospital, Toyota-shi, Japan

8 Japanese Red Cross Karatsu Hospital, Karatsu-shi, Japan

9 Cancer and Infectious Diseases Center, Tokyo Metropolitan Komagome Hospital, Bunkyo-ku, Japan

10 Japanese Red Cross Date Hospital, Date-shi, Japan

11 JCHO Yamanashi Hospital, Kofu-shi, Japan

12 Shinmatsuda-kai Atago Hospital, Itabashi-ku, Japan

13 Saiseikai Yokohama Nanbu Hospital, Yokohama-shi, Japan

14 Toho University Ohashi Medical Center, Meguro-ku, Japan

15 Ishikawa Prefectural Central Hospital, Kanazawa-shi, Japan

16 Tama General Medical Center, Fuchu-shi, Japan

17 Yokohama Shin-Midori General Hospital, Yokohama-shi, Japan

18 National Hospital Organization Kure Medical Center and Chugoku Cancer Center, Kure-shi, Japan

19 Sendai City Medical Center Sendai Open Hospital, Sendai-shi, Japan

20 Tokyo Women's Medical University, Sinjukuku, Japan

21 Nippon Medical School Musashikosugi Hospital, Kawasaki-shi, Japan

22 Fujisawa Shonandai Hospital, Fujisawa-shi, Japan

23 Aizu Medical Center, Fukushima Medical University, Aizuwakamatsu-shi, Japan

24 Graduate School of Medicine, Juntendo University, Bunkyo-ku, Japan

25 Chiba University Graduate School of Medicine, Chiba-shi, Japan

26 St. Marianna University School of Medicine, Kawasaki-shi, Japan

27 Hiroshima University Hospital, Minami‑ku, Japan

28 Saiseikai Yokohamashi Nanbu Hospital, Yokohama-shi, Japan

29 The University of Tokyo, Graduate School of Medicine, Bunkyo-ku, Japan

30 Tokyo Women's Medical University, Sinjuku-ku, Japan

31 NTT Medical Center Tokyo, Shinagawa-Ku, Japan