[1] Natl Kyushu Canc Ctr, Fukuoka, Japan
[2] Kanagawa Canc Ctr, Yokohama, Kanagawa, Japan
[3] Osaka Univ, Sch Med, Suita, Osaka, Japan
[4] Tohoku Univ Hosp, Dept Med Oncol, Sendai, Miyagi, Japan
[5] Keio Univ, Sch Med, Div Outpatient Chemotherapy, Ctr Canc, Tokyo, Japan
[6] Hiroshima Univ, Hiroshima, Japan
[7] Japanese Fdn Canc Res, Canc Inst Hosp, Dept Gastroenterol, Tokyo, Japan
[8] Hyogo Canc Ctr, Akashi, Hyogo, Japan
[9] Ishikawa Prefectural Cent Hosp, Dept Gastroenterol, Kanazawa, Ishikawa, Japan
[10] Osaka Metropolitan Univ, Osaka, Japan
[11] Natl Hosp Org Shikoku Canc Ctr, Matsuyama, Ehime, Japan
[12] Teine Keijinkai Hosp, Ctr Gastroenterol, Sapporo, Hokkaido, Japan
[13] Natl Canc Ctr, Tokyo, Japan
[14] Natl Canc Ctr Hosp East, Kashiwa, Chiba, Japan
[15] Aichi Canc Ctr Hosp, Dept Gastroenterol, Nagoya, Aichi, Japan
[16] Oita Univ Hosp, Oita, Japan
[17] Niigata Canc Ctr Hosp, Niigata, Japan
[18] Kanagawa Canc Ctr, Dept Gastroenterol, Yokohama, Kanagawa, Japan