[1] St Marianna Univ, Sch Med, Dept Clin Oncol, Kawasaki, Kanagawa, Japan
[2] Natl Canc Ctr, Dept Hepatobiliary & Pancreat Oncol, Tokyo, Japan
[3] Natl Canc Ctr Hosp East, Dept Hepatobiliary & Pancreat Oncol, Kashiwa, Chiba, Japan
[4] Kanagawa Canc Ctr, Hepatobiliary & Pancreat Med Oncol Div, Dept Gastroenterol, Yokohama, Kanagawa, Japan
[5] Hokkaido Univ Hosp, Dept Gastroenterol & Hepatol, Sapporo, Hokkaido, Japan
[6] Kyorin Univ, Fac Med, Dept Med Oncol, Tokyo, Japan
[7] Saitama Canc Ctr, Dept Gastroenterol, Ina, Saitama, Japan
[8] Chiba Canc Ctr, Dept Gastroenterol, Chiba, Japan
[9] Kyushu Univ, Grad Sch Med Sci, Dept Surg & Sci, Fukuoka, Fukuoka, Japan
[10] Natl Hosp Org Shikoku Canc Ctr, Dept Gastrointestinal Med Oncol, Matsuyama, Ehime, Japan
[11] Kansai Rosai Hosp, Dept Surg, Amagasaki, Hyogo, Japan
[12] Kindai Univ, Fac Med, Dept Gastroenterol & Hepatol, Osakasayama, Japan
[13] Osaka Univ, Grad Sch Med, Dept Frontier Sci Canc & Chemotherapy, Suita, Osaka, Japan
[14] Natl Canc Ctr Hosp East, Clin Res Support Off, Kashiwa, Chiba, Japan
[15] Natl Canc Ctr Hosp East, Dept Pathol & Clin Labs, Kashiwa, Chiba, Japan
[16] Natl Canc Ctr, Exploratory Oncol Res & Clin Trial Ctr, Kashiwa, Chiba, Japan
[17] Natl Canc Ctr Hosp East, Clin Res Support Off, Translat Res Management Div, Biobank Translat Res Support Sect, Kashiwa, Chiba, Japan
[18] Natl Canc Ctr Hosp East, Dept Gastroenterol & Gastrointestinal Oncol, Kashiwa, Chiba, Japan