[1] Chuo Univ, Integrated Sci & Engn Sustainable Soc, Tokyo, Japan
[2] Osaka Natl Hosp, Osaka, Japan
[3] Japanese Red Cross Med Ctr, Tokyo, Japan
[4] Hyogo Coll Med, Dept Surg, Div Upper Gastrointestinal Surg, Nishinomiya, Hyogo, Japan
[5] Natl Canc Ctr, Dept Hepatobiliary & Pancreat Oncol, Tokyo, Japan
[6] Natl Canc Ctr Hosp East, Chiba, Japan
[7] Saitama Med Univ, Int Med Ctr, Hidaka, Japan
[8] Nakamura Med Clin, Kuwana, Japan
[9] Toho Univ, Tokyo, Japan
[10] Daiichi Sankyo, Tokyo, Japan
[11] Daiichi Sankyo Co Ltd, Tokyo, Japan
[12] Osaka Int Canc Inst, Osaka, Japan