[1] Hiroshima Univ Hosp, Dept Gastroenterol, 1-2-3 Kasumi,Minami Ku, Hiroshima 7348551, Japan
[2] Nippon Med Sch, Dept Gastrointestinal Hepatobiliary Pancreat Surg, Tokyo, Japan
[3] Nippon Med Sch, Grad Sch Med, Dept Gastroenterol, Tokyo, Japan
[4] Jichi Med Univ, Dept Med, Div Gastroenterol, Tochigi, Japan
[5] Tokyo Metropolitan Canc & Infect Dis Ctr, Komagome Hosp, Dept Colorectal Surg, Tokyo, Japan
[6] Shizuoka Canc Ctr, Div Colon & Rectal Surg, Shizuoka, Japan
[7] Shizuoka Canc Ctr, Div Endoscopy, Shizuoka, Japan
[8] Osaka Int Canc Inst, Dept Gastrointestinal Oncol, Osaka, Japan
[9] Natl Hosp Org Kure Med Ctr, Dept Gastroenterol, Hiroshima, Japan
[10] Showa Univ, Northern Yokohama Hosp, Digest Dis Ctr, Kanagawa, Japan
[11] Japanese Fdn Canc Res, Dept Lower Gastrointestinal Med, Canc Inst Hosp, Tokyo, Japan
[12] Toranomon Gen Hosp, Dept Gastroenterol Surg, Tokyo, Japan
[13] Kyorin Univ, Sch Med, Dept Surg, Tokyo, Japan
[14] Hyogo Coll Med, Dept Surg, Div Lower Gastrointestinal Surg, Nishinomiya, Hyogo, Japan
[15] Tokyo Womens Med Univ, Inst Gastroenterol, Dept Surg, Tokyo, Japan
[16] Tokyo Med & Dent Univ, Dept Gastroenterol & Hepatol, Tokyo, Japan
[17] Tokyo Med & Dent Univ, Dept Gastrointestinal Surg, Tokyo, Japan
[18] Iwate Med Univ, Dept Internal Med, Div Gastroenterol, Morioka, Iwate, Japan
[19] Iwate Med Univ, Dept Diagnost Pathol, Yahaba, Iwate, Japan
[20] Gunma Univ, Grad Sch Med, Dept Gastroenterol & Hepatol, Gunma, Japan
[21] Matsuyama Red Cross Hosp, Div Gastroenterol, Matsuyama, Ehime, Japan
[22] Saitama Med Univ, Int Med Ctr, Dept Gastroenterol Surg, Saitama, Japan
[23] Jikei Univ, Sch Med, Dept Internal Med, Div Gastroenterol & Hepatol, Tokyo, Japan
[24] Hiroshima City Hiroshima Citizens Hosp, Dept Surg, Hiroshima, Japan
[25] Kindai Univ, Dept Gastroenterol & Hepatol, Fac Med, Osaka, Japan
[26] Kurume Univ, Sch Med, Dept Surg, Fukuoka, Japan
[27] Natl Canc Ctr Hosp East, Dept Gastroenterol & Endoscopy, Chiba, Japan
[28] Natl Canc Ctr Hosp East, Dept Colorectal Surg, Chiba, Japan
[29] Saga Univ, Fac Med, Dept Internal Med, Div Gastroenterol, Saga, Japan
[30] Juntendo Univ, Fac Med, Dept Coloproctol Surg, Tokyo, Japan
[31] Juntendo Univ, Grad Sch Med, Dept Human Pathol, Tokyo, Japan
[32] Kansai Med Univ Hosp, Dept Gastrointestinal Surg, Osaka, Japan
[33] Kyoto Univ Hosp, Dept Clin Oncol, Kyoto, Japan
[34] Teikyo Univ, Chiba Med Ctr, Dept Surg, Chiba, Japan
[35] Maebashi Red Cross Hosp, Dept Gastroenterol, Gunma, Japan
[36] Aichi Canc Ctr Hosp, Dept Gastroenterol Surg, Aichi, Japan
[37] Asahikawa City Hosp, Dept Gastroenterol, Asahikawa, Hokkaido, Japan
[38] Natl Canc Ctr, Dept Colorectal Surg, Tokyo, Japan
[39] Natl Canc Ctr, Div Endoscopy, Tokyo, Japan
[40] Takano Hosp, Dept Surg, Coloproctol Ctr, Kumamoto, Japan
[41] Univ Tokyo, Dept Surg Oncol, Tokyo, Japan
[42] Tokushima Univ, Grad Sch Biomed Sci, Dept Gastroenterol & Oncol, Tokushima, Japan
[43] Fukushima Med Univ, Aizu Med Ctr, Dept Coloproctol, Fukushima, Japan
[44] Natl Def Med Coll, Dept Surg, Tokorozawa, Saitama, Japan
[45] Kyushu Univ, Grad Sch Med Sci, Dept Med & Clin Sci, Fukuoka, Japan
[46] Japanese Red Cross Med Ctr, Dept Colorectal Surg, Tokyo 1508935, Japan
[47] Fujita Hlth Univ, Sch Med, Dept Adv Endoscopy, Toyoake, Aichi, Japan
[48] Natl Hosp Org Osaka Natl Hosp, Dept Surg, Osaka, Japan
[49] Kyoto Prefectural Univ Med, Dept Surg, Div Digest Surg, Kyoto, Japan
[50] Hiroshima City North Med Ctr Asa Citizens Hosp, Dept Gastroenterol, Hiroshima, Japan