1 Centro Hospitalar e Universitário de Lisboa Norte, Lisboa, Portugal

2 Faculdade de Medicina de Lisboa, Lisbon, Portugal

3 Centro Hospitalar Universitário Lisboa Central, Lisboa, Portugal

4 Centro Hospital de São Bernardo, Palmela, Portugal

5 Hospital Beatriz Ângelo, Lisboa, Portugal

1 Gastroenterology Practice Clinics, Nuremberg, Germany

2 Klinikum Neumarkt i.d. Oberpfalz, Neumarkt in der Oberpfalz, Germany

3 Kreisklinik Roth, Roth, Germany

4 Malteser Waldkrankenhaus St. Marien, Erlangen, Germany

1 Zhongshan Hospital, Fudan University, Shanghai, China

1 Seoul National University Bundang Hospital, Seongnam, Korea, Republic of

2 Yonsei University Yongin Severance Hospital, Yongin-si, Korea, Republic of

1 Kagawa Prefectural Central Hospital, Takamatsu, Japan

2 Okayama University Graduate School of Medicine, Okayama, Japan

3 Kurashiki Central Hospital, Kurashiki, Japan

4 Mitoyo general hospital, Kanonji, Japan

5 Osaka International Cancer Institute, Osaka, Japan

6 Ishikawa Prefectural Central Hosp., Kanazawa, Japan

7 Japanese Red Cross Mihara Hospital, Mihara, Japan

8 Kohnodai Hospital, National Center for Global Health and Medicine, Ichikawa, Japan

9 Onomichi Municipal Hospital, Onomichi, Japan

10 Fukushima Medical University Hospital, Fukushima, Japan

11 Sumitomo Besshi Hospital, Niihama, Japan

12 Osaka City General Hospital, Osaka, Japan

13 University of Tokyo Hospital, Tokyo, Japan

14 National Hospital Organization Fukuyama Medical Center, Fukuyama, Japan

15 Tsuyama Chuo Hospital, Tsuyama, Japan

16 Teraoka Memorial Hospital, Fukuyama, Japan

17 National Hospital Organization Iwakuni Clinical Center, Iwakuni, Japan

18 Okayama City Hospital, Okayama, Japan

19 Japanese Red Cross Society Himeji Hospital, Himeji, Japan

20 Aso Iizuka Hospital Dept. of Gastroenterology, Iizuka, Japan

21 Hamamatsu University School of Medicine, Hamamatsu, Japan

22 Kawasaki Medical School General Medical Center, Okayama, Japan

1 Toyonaka Municipal Hospital, Toyonaka, Japan

2 Osaka University Graduate School of Medicine, Suita, Japan

3 Osaka International Cancer Institute, Osaka, Japan

4 Nishinomiya Municipal Central Hospital, Nishinomiya, Japan

5 Sakai City Medical Center, Sakai, Japan

6 Osaka Police Hospital, Osaka, Japan

7 Suita Municipal Hospital, Suita, Japan

8 Itami City Hospital, Itami, Japan

9 Hyogo Prefectural Nishinomiya Hospital, Nishinomiya, Japan

10 Japan Community Healthcare Organization Osaka Hospital, Osaka, Japan

1 Japanese Red cross Otsu hospital, Otsu, Japan

2 Sapporo Kinentou Hospital, Sapporo, Japan

3 National Cancer Center Hospital, Tokyo, Japan

4 Hyogo Cancer Center, Akashi, Japan

5 Aichi Cancer Center Hospital, Nagoya, Japan

6 Japanese Red Cross Osaka Hospital, Osaka, Japan

7 National Cancer Center Hospital East, Kashiwa, Japan

8 Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan

9 Fukushima Medical University Hospital, Fukushima, Japan

10 Graduate School of Medicine, Kyoto University, Kyoto, Japan