Affiliation: | 1. Department of Pediatrics, Tohoku University Graduate School of Medicine, , Sendai, Miyagi, Japan;2. Department of Hematology and Oncology, Miyagi Children's Hospital, , Sendai, Miyagi, Japan;3. Department of General Pediatrics, Miyagi Children's Hospital, , Sendai, Miyagi, Japan;4. Department of Pediatrics, Graduate School of Medicine and Pharmaceutical Science, University of Toyama, , Toyama, Toyama, Japan;5. Department of Pediatrics, Nagoya University Graduate School of Medicine, , Nagoya, Aichi, Japan;6. Department of Pediatrics, Hirosaki University School of Medicine, , Hirosaki, Aomori, Japan;7. Department of Pediatrics, Hokkaido University Graduate School of Medicine, , Sapporo, Hokkaido, Japan |