1. Department of Paediatrics; Saitama Medical University; Saitama Japan
2. Department of Paediatrics; University of Yamanashi; Yamanashi Japan
3. Department of Paediatrics; Yokohama City Minato Red Cross Hospital; Kanagawa Japan
4. Department of Paediatrics; Osaka City University Graduate School of Medicine; Osaka Japan
5. Division of Paediatrics Endocrinology and Metabolism; Shikoku Medical Centre for Children and Adults; Kagawa Japan
6. Department of Paediatrics and Child Health; Nihon University School of Medicine; Tokyo Japan
7. Department of Paediatrics; Tokyo Women's Medical University Medical Centre East; Tokyo Japan