[1] Wakayama Med Univ, Sch Med, Dept Internal Med 2, 811-1 Kimiidera, Wakayama 6410012, Japan
[2] Japanese Red Cross Wakayama Med Ctr, Dept Gastroenterol, Wakayama, Japan
[3] Wakayama Med Univ Hosp, Clin Study Support Ctr, Wakayama, Japan
[4] Wakayama Med Univ, Dept Surg 2, Wakayama, Japan
[5] Sapporo Med Univ Hosp, Med Oncol, Sapporo, Hokkaido, Japan
[6] Teine Keijinkai Hosp, Ctr Gastroenterol, Sapporo, Hokkaido, Japan
[7] Japanese Red Cross Date Hosp, Dept Gastroenterol, Asahikawa, Hokkaido, Japan
[8] Asahikawa Med Univ, Gastroenterol & Endoscopy, Div Metab & Biosyst Sci, Gastroenterol & Hematol Oncol,Dept Med, Asahikawa, Hokkaido, Japan
[9] Hokkaido Univ Hosp, Dept Gastroenterol & Hepatol, Sapporo, Hokkaido, Japan
[10] Osaka Int Canc Inst, Dept Canc Survey, Osaka, Japan
[11] Osaka Int Canc Inst, Dept Gastrointestinal Oncol, Osaka, Japan
[12] Kindai Univ, Fac Med, Dept Gastroenterol & Hepatol, Higashiosaka, Osaka, Japan
[13] Osaka Univ, Grad Sch Med, Gastroenterol & Hepatol, Osaka, Japan
[14] Osaka City Gen Hosp, Dept Gastroenterol, Osaka, Japan
[15] Yodogawa Christians Hosp, Dept Gastroenterol & Hepatol, Osaka, Japan
[16] Kansai Med Univ, Kori Hosp, Hirakata, Osaka, Japan
[17] Kindai Univ, Fac Med, Dept Surg, Osaka, Japan
[18] Chiba Univ, Chiba Canc Ctr, Gastroenterol, Chiba, Japan
[19] Chiba Univ, Grad Sch Med, Dept Gastroenterol, Chiba, Japan
[20] Natl Canc Ctr Hosp East, Dept Hepatobiliary & Pancreat Oncol, Chiba, Japan
[21] Tokyo Med Univ, Gastroenterol & Hepatol, Tokyo, Japan
[22] Tokyo Womens Med Univ Hosp, Inst Gastroenterol, Dept Internal Med, Tokyo, Japan
[23] Univ Tokyo Hosp, Dept Gastroenterol, Tokyo, Japan
[24] Tokyo Metropolitan Tama Med Ctr, Dept Gastroenterol, Tokyo, Japan
[25] Juntendo Univ, Grad Sch Med, Dept Gastroenterol, Tokyo, Japan
[26] Matsusaka Municipal Hosp, Dept Gastroenterol, Matsusaka, Mie, Japan
[27] Shizuoka Canc Ctr, Div Endoscopy, Shizuoka, Japan
[28] Okayama Univ Hosp, Gastroenterol, Okayama, Japan
[29] Fukuyama City Hosp, Lnternal Med, Fukuyama, Hiroshima, Japan
[30] Hiroshima Prefectural Hosp, Dept Gastroenterol, Hiroshima, Japan
[31] Natl Hosp Org Kure Med Ctr, Gastroenterol, Hiroshima, Japan
[32] Chugoku Canc Ctr, Hiroshima, Japan
[33] Tokai Univ, Div Gastroenterol, Sch Med, Hiratsuka, Kanagawa, Japan
[34] Kagoshima Univ, Digest & Lifestyle Dis, Kagoshima, Japan
[35] Hyogo Canc Ctr, Gastroenterol Oncol, Akashi, Hyogo, Japan
[36] Hyogo Coll Med, Dept Internal Med, Div Hepatobiliary & Pancreat Dis, Nishinomiya, Hyogo, Japan
[37] Kakogawa Cent City Hosp, Dept Gastroenterol, Kakogawa, Hyogo, Japan
[38] Kurume Univ, Sch Med, Dept Med, Div Gastroenterol, Kurume, Fukuoka, Japan
[39] Kyushu Univ, Grad Sch Med Sci, Dept Med & Bioregulatory Sci, Fukuoka, Japan
[40] Saitama Med Univ, Gastroenterol, Int Med Ctr, Saitama, Japan
[41] Nara Med Univ, Gastroenterol, Nara, Japan
[42] Kyoto Prefectural Univ Med, Dept Gastroenterol & Hepatol, Kyoto, Japan
[43] Tokushima Univ Hosp, Dept Digest & Transplant Surg, Tokushima, Japan
[44] Nagasaki Univ Hosp, Dept Gastroenterol & Hepatol, Nagasaki, Japan
[45] Niigata Canc Ctr Hosp, Internal Med, Niigata, Japan
[46] Sendai Kousei Hosp, Dept Gastroenterol, Sendai, Miyagi, Japan
[47] Tohoku Univ, Grad Sch Med, Div Gastroenterol, Sendai, Miyagi, Japan
[48] Shimane Univ Hosp, Dept Med Oncol, Izumo, Shimane, Japan
[49] Yamagata Prefectural Cent Hosp, Dept Gastroenterol, Yamagata, Japan
[50] Aichi Canc Ctr, Gastroenterol, Nagoya, Aichi, Japan