1. Division of Pediatrics, Department of Homeostatic Regulation and Development, Faculty of Medicine, Graduate School of Medical and Dental Sciences, Niigata University, Niigata 951-8510, Japan
2. Department of Pediatrics, Yamagata University School of Medicine, Yamagata 990-2331, Japan
3. Department of Endocrinology and Metabolism, Aichi Children’s Health and Medical Center, Obu 474-8710, Japan
4. Department of Endocrinology and Metabolism, Fukuoka Children’s Hospital, Fukuoka 813-0017, Japan
5. Department of Pediatric Endocrinology and Environmental Medicine, Graduate School of Medicine, Tohoku University, Sendai 980-8575, Japan
6. Department of Pediatrics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan