[1] Gunma Childrens Med Ctr, Dept Hematol Oncol, 779 Shimohakoda, Shibukawa, Gunma 3778577, Japan
[2] Gunma Univ, Grad Sch Med, Dept Pediat, Gunma, Japan
[3] Natl Hosp Org Nagoya Med Ctr, Clin Res Ctr, Nagoya, Aichi, Japan
[4] Yokohama City Univ Med, Dept Pediat, Yokohama, Kanagawa, Japan
[5] Kyoto Univ, Grad Sch Med, Dept Pathol & Tumor Biol, Kyoto, Japan
[6] Univ Tokyo, Inst Med Sci, Ctr Human Genome, Lab DNA Informat Anal, Tokyo, Japan
[7] Natl Res Inst Child Hlth & Dev, Dept Pediat Hematol & Oncol Res, Tokyo, Japan
[8] Natl Ctr Child Hlth & Dev, Childrens Canc Ctr, Tokyo, Japan
[9] Kyoto Univ, Grad Sch Med, Dept Human Hlth Sci, Kyoto, Japan
[10] Shiga Univ Med Sci, Dept Pediat, Otsu, Shiga, Japan
[11] Univ Tokyo, Inst Med Sci, Ctr Human Genome, Lab Sequence Anal, Tokyo, Japan
[12] Karolinska Inst, Dept Med, Ctr Hematol & Regenerat Med, Stockholm, Sweden
[13] Japanese Red Cross Gunma Blood Ctr, Gunma, Japan