[1] Natl Canc Ctr Hosp East, Chiba, Japan
[2] Seoul Natl Univ Hosp, Seoul, South Korea
[3] Yonsei Canc Ctr, Seoul, South Korea
[4] Niigata Canc Ctr Hosp, Niigata, Japan
[5] Natl Canc Ctr, Dept Expt Therapeut, Tokyo, Japan
[6] Osaka Univ Hosp, Osaka, Japan
[7] Aichi Canc Ctr Hosp, Dept Clin Oncol, Nagoya, Aichi, Japan
[8] Osaka Int Canc Inst, Osaka, Japan
[9] Kobe City Med Ctr Gen Hosp, Kobe, Hyogo, Japan
[10] Osaki Citizen Hosp, Osaki, Japan
[11] Miyagi Canc Ctr, Natori, Miyagi, Japan
[12] Kochi Hlth Sci Ctr, Kochi, Japan
[13] Natl Hosp Org Shikoku Canc Ctr, Matsuyama, Ehime, Japan
[14] Gunma Prefectural Canc Ctr, Ota, Japan
[15] Komagome Hosp, Tokyo Metropolitan Canc & Infect Dis Ctr, Tokyo, Japan
[16] Daiichi Sankyo Co Ltd, Tokyo, Japan
[17] Daiichi Sankyo Inc, Basking Ridge, NJ USA
[18] Japanese Fdn Canc Res, Canc Inst Hosp, Tokyo, Japan