[1] Univ Tokyo, Grad Sch Med, Dept Hematol & Oncol, Bunkyo Ku, Tokyo 1138655, Japan
[2] Univ Tokyo, Grad Sch Med, Dept Cell Therapy & Transplantat Med, Bunkyo Ku, Tokyo 1138655, Japan
[3] Univ Tokyo, Grad Sch Med, Dept Blood Transfus Med, Bunkyo Ku, Tokyo 1138655, Japan
[4] Natl Inst Basic Biol, Tissue & Cell Culture Lab, Okazaki, Aichi 4448585, Japan
[5] RIKEN, Ctr Dev Biol, Lab Vertebrate Body Plan, Chuo Ku, Kobe, Hyogo 6500047, Japan