[1] Kindai Univ, Fac Med, Osaka, Japan
[2] Kindai Univ, Fac Med, Osakasayama, Japan
[3] Natl Canc Ctr Hp East, Kashiwa, Chiba, Japan
[4] Kurume Univ, Sch Med, Kurume, Fukuoka, Japan
[5] Hiroshima Univ Hosp, Dept Gastroenterol & Metab, Hiroshima, Japan
[6] Musashino Red Cross Hosp, Dept Gastroenterol & Hepatol, Tokyo, Japan
[7] Yamaguchi Univ, Grad Sch Med, Ube, Yamaguchi, Japan
[8] Kawasaki Med Sch, Okayama, Japan
[9] Nagoya Univ, Grad Sch Med, Dept Gastroenterol & Hepatol, Nagoya, Aichi, Japan
[10] Jichi Med Univ, Shimono, Japan
[11] Kyoto Prefectural Univ Med, Grad Sch Med Sci, Kyoto, Japan
[12] Social Insurance Tagawa Hosp, Div Gastroenterol, Dept Med, Tagawa, Japan
[13] Kagoshima Univ Hosp, Dept Gastroenterol, Kagoshima, Japan
[14] Fujita Hlth Univ, Sch Med, Dept Liver Biliary Tract & Pancreas Dis, Toyoake, Aichi, Japan
[15] Nagasaki Univ, Grad Sch Biomed Sci, Dept Gastroenterol & Hepatol, Nagasaki, Japan
[16] Natl Hosp Org Kyushu Med Ctr, Fukuoka, Japan
[17] Kyoto Univ Hosp, Translat Res Ctr, Kyoto, Japan
[18] Natl Canc Ctr, Dept Hepatobiliary & Pancreat Oncol, Tokyo, Japan
[19] Kyorin Univ, Fac Med, Tokyo, Japan
[20] Natl Canc Ctr, Tokyo, Japan