[1] Japanese Red Cross Nagoya First Hosp, Dept Pediat Hematol & Oncol, Nagoytt, Japan
[2] Shizuoka Childrens Hosp, Dept Hematol & Oncol, Shizuoka, Japan
[3] Showa Univ, Fujigaoka Hosp, Dept Pediat, Yokohama, Kanagawa, Japan
[4] Natl Kyushu Canc Ctr, Dept Pediat, Fukuoka, Fukuoka, Japan
[5] Tohoku Univ Hosp, Dept Pediat, Sendai, Miyagi, Japan
[6] Osaka Univ, Grad Sch Med, Dept Pediat, Suita, Osaka, Japan
[7] Miyagi Childrens Hosp, Dept Hematol & Oncol, Sendai, Miyagi, Japan
[8] Japanese Data Ctr Hematopoiet Cell Tmnsplantat, Nagoya, Aichi, Japan
[9] Hyogo Prefectural Kobe Childrens Hosp, Dept Hermatol & Oncol, Kobe, Hyogo, Japan