1. Department of Pediatrics; Graduate School of Medicine; Gifu University; Gifu Japan
2. Department of Pediatrics; Faculty of Medicine; Shimane University; Izumo Shimane Japan
3. Department of Pediatrics; Osaka City University Graduate School of Medicine; Osaka Japan
4. Division of Endocrinology and Metabolism; National Center for Child Health and Development; Tokyo Japan
5. Department of Health Science; Faculty of Medical Sciences; University of Fukui; Fukui Japan
6. Division of Emergency and General Medicine; Chiba Children's Hospital; Chiba Japan