1. Department of Pediatrics, Hokkaido University School of Medicine, Sapporo, Japan
2. Endocrinology and Metabolism Unit, Tokyo Metropolitan Children’s Hospital, Fuchu, Japan
3. Department of Child Development, Kumamoto University Graduate School, Kumamoto, Japan
4. Department of Pediatrics, FukuiKen Saiseikai Hospital, Fukui, Japan
5. Division of Pediatrics, Department of Homeostatic Regulation and Development, Niigata University Graduate School of Medicine and Dental Sciences, Niigata, Japan