[1] Univ Tokyo, Dept Pediat, Tokyo, Japan
[2] Hiroshima Univ, Dept Pediat, Hiroshima, Japan
[3] Natl Res Inst Child Hlth & Dev, Dept Maternal Fetal Biol, Tokyo, Japan
[4] Univ Tokyo Hosp, Dept Cell Therapy & Transplantat Med, Tokyo, Japan
[5] Kyoto Univ, Dept Pathol & Tumor Biol, Grad Sch Med, Kyoto, Japan
[6] Univ Tokyo, Lab DNA Informat Anal, Inst Med Sci, Human Genome Ctr, Tokyo, Japan
[7] Saitama Childrens Med Ctr, Dept Hematol Oncol, Saitama, Japan