[1] Kurume Univ, Sch Med, Dept Med, Div Gastroenterol, Kurume, Fukuoka, Japan
[2] Natl Kyushu Canc Ctr, Fukuoka, Japan
[3] Saga Med Ctr Koseikan, Dept Med Oncol, Saga, Japan
[4] Saga Med Ctr Koseikan, Dept Hepatobiliary & Pancreatol, Saga, Japan
[5] Japanese Red Cross Kumamoto Hosp, Dept Hematol & Oncol, Kumamoto, Japan
[6] Kagoshima City Hosp, Dept Med Oncol, Kagoshima, Japan
[7] Oita Univ, Dept Med Oncol & Hematol, Fac Med, Yufu, Japan
[8] Kagoshima Univ, Digest & Lifestyle Dis, Grad Sch Med & Dent Sci, Kagoshima, Japan
[9] Japan Community Hlth Care Org Kyushu Hosp, Dept Hematol Oncol, Kitakyushu, Fukuoka, Japan
[10] Saiseikai Sendai Hosp, Dept Gastroenterol, Satsumasendai, Japan
[11] Nagasaki Univ Hosp, Nagasaki, Japan
[12] Kurume Univ, Fukuoka, Japan
[13] Kurume Univ Hosp, Kurume, Fukuoka, Japan
[14] Natl Canc Ctr Hosp East, Kashiwa, Chiba, Japan
[15] Sasebo Kyosai Hosp, Dept Med Oncol, Sasebo, Japan
[16] Karatsu Red Cross Hosp, Dept Internal Med, Karatsu, Japan
[17] Saga Ken Med Ctr Koseikan, Dept Med Oncol, Saga, Japan
[18] Hamanomachi Hosp, Dept Med Oncol, Fukuoka, Japan
[19] Natl Hosp Org Kyushu Canc Ctr, Dept Gastrointestinal & Med Oncol, Fukuoka, Japan