[1] Tokai Univ, Dept Hematol & Oncol, Hiratsuka, Kanagawa 25912, Japan
[2] Nagoya Daini Red Cross Hosp, Nagoya, Aichi, Japan
[3] Tohoku Univ Hosp, Sendai, Miyagi, Japan
[4] Dong A Univ, Coll Med, Dept Internal Med, Pusan, South Korea
[5] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Dept Med,Div Hematol Oncol, Seoul, South Korea
[6] MSD KK, Tokyo, Japan
[7] Natl Canc Ctr, Tokyo, Japan