[1] Natl Res Inst Child Hlth & Dev, Dept Pediat Hematol & Oncol Res, Tokyo, Japan
[2] Univ Tokyo, Dept Pediat, Tokyo, Japan
[3] Natl Ctr Child Hlth & Dev, Childrens Canc Ctr, Tokyo, Japan
[4] Hokkaido Univ, Dept Pediat, Sapporo, Hokkaido, Japan
[5] Saitama Med Univ, Int Med Ctr, Dept Pediat Hematol & Oncol, Saitama, Japan
[6] Univ Tsukuba Hosp, Dept Pediat, Tsukuba, Ibaraki, Japan
[7] Natl Res Inst Child Hlth & Dev, Dept Maternal Fetal Biol, Tokyo, Japan
[8] Kyoto Univ, Dept Pathol & Tumor Biol, Kyoto, Japan
[9] Kyoto Univ, Inst Adv Study Human Biol WPI ASHBi, Kyoto, Japan
[10] Karolinska Inst, Dept Mol Hematol, Stockholm, Sweden