1. Department of Pediatrics and Developmental Biology, Graduate School of Medicine, Tokyo Medical and Dental University, Tokyo, Japan;
2. Department of Pediatrics, Gifu Municipal Hospital, Gifu, Japan;
3. Department of Laboratory Medicine, Shinshu University School of Medicine, Nagano, Japan;
4. Department of Pediatrics, Nagoya University Graduate School of Medicine, Aichi, Japan;
5. Department of Laboratory Sciences, Kanazawa University School of Health Sciences, Ishikawa, Japan; and
6. Department of Pediatrics, Shinshu University School of Medicine, Nagano, Japan