[1] Okayama Univ, Dept Gastroenterol & Hepatol, Grad Sch Med Dent & Pharmaceut Sci, Okayama, Japan
[2] Kawasaki Med Sch Hosp, Med Oncol Dept, Kurashiki, Okayama, Japan
[3] Ishikawa Prefectural Cent Hosp, Dept Med Oncol, Kanazawa, Ishikawa, Japan
[4] Toyama Univ Hosp, Dept Internal Med 3, Toyama, Japan
[5] Kochi Hlth Sci Ctr, Div Gastroenterol Med, Kochi, Japan
[6] Steel Mem Muroran Hosp, Dept Gastroenterol, Muroran, Hokkaido, Japan
[7] Tokyo Womens Med Univ, Dept Chemotherapy, Tokyo, Japan
[8] Kansai Med Univ, Canc Treatment Ctr, Hirakata, Osaka, Japan
[9] Natl Hosp Org Okayama Med Ctr, Dept Gastroenterol, Okayama, Japan
[10] Okayama Saiseikai Gen Hosp, Dept Internal Med, Okayama, Japan
[11] Okayama Red Cross Hosp, Dept Gastroenterol, Okayama, Japan
[12] Aizawa Hosp, Aizawa Comprehens Canc Ctr, Matsumoto, Nagano, Japan
[13] Kagawa Univ Hosp, Dept Clin Oncol, Miki, Kagawa, Japan
[14] Nakadori Gen Hosp, Dept Gastroenterol Surg, Akita, Japan
[15] Konko Hosp, Dept Surg, Asakuchi, Japan
[16] Japan Community Healthcare Org Kyushu Hosp, Dept Hematol Oncol, Kitakyushu, Fukuoka, Japan
[17] Kawasaki Med Sch Hosp, Dept Clin Oncol, Kurashiki, Okayama, Japan