[1] Kyoto Prefectural Univ Med, Grad Sch Med Sci, Dept Mol & Lab Med, Kyoto, Japan
[2] Kyoto Prefectural Univ Med, Grad Sch Med Sci, Dept Mol Hematol & Oncol, Kyoto, Japan
[3] Ibaraki Childrens Hosp, Dept Pediat, Ibaraki, Japan
[4] Gunma Childrens Med Ctr, Gunma, Japan