[1] Univ Tokyo, Dept Pediat, Tokyo, Japan
[2] Kyoto Univ, Grad Sch Med, Dept Pathol & Tumor Biol, Kyoto, Japan
[3] Tokyo Med & Dent Univ, Dept Pediat & Dev Biol, Tokyo, Japan
[4] Univ Tokyo, Ctr Human Genome, Lab DNA Informat Anal, Tokyo, Japan
[5] Univ Tokyo, Ctr Human Genome, Lab DNA Informat Anal, Lab Sequence Anal, Tokyo, Japan
[6] Univ Tokyo, Inst Med Sci, Ctr Human Genome, Tokyo, Japan
[7] Univ Tokyo, Genome Sci Div, Res Ctr Adv Sci & Technol, Tokyo, Japan
[8] Natl Canc Ctr Japan, Dept Pediat Oncol, Tokyo, Japan
[9] Japan Childrens Canc Grp JCCG, Infant Leukemia Sub Comm, Tokyo, Japan
[10] Osaka Univ, Grad Sch Med, Dept Pediat, Osaka, Japan
[11] Natl Ctr Child Hlth & Dev, Dept Pediat Hematol & Oncol Res, Tokyo, Japan
[12] Japan Childrens Canc Grp JCCG, Tokyo, Japan
[13] Nara Med Univ, Dept Pediat, Kashihara, Nara, Japan
[14] Natl Ctr Child Hlth & Dev, Childrens Canc Ctr, Div Leukemia & Lymphoma, Tokyo, Japan
[15] Ehime Univ, Grad Sch Med, Dept Pediat, Ehime, Japan
[16] Tokyo Med & Dent Univ Grad Sch Med, Dept Pediat & Dev Biol, Tokyo, Japan