1. Third Department of Medicine, Teikyo University Chiba Medical Center, Ichihara 299-0111, Japan
2. Department of Pediatrics, Osaka University Graduate School of Medicine, Suita 565-0871, Japan
3. Fujii Memorial Institute of Medical Sciences, Tokushima University, Tokushima 770-8503, Japan
4. Internal Medicine 1, Shimane University Faculty of Medicine, Izumo 693-8501, Japan
5. Department of Endocrinology, Chiba Children’s Hospital, Chiba 266-0007, Japan
6. Department of Bone and Mineral Research, Research Institute, Osaka Medical Center for Maternal and Child Health, Izumi 594-1101, Japan
7. Division of Endocrinology, Toranomon Hospital Endocrine Center, Tokyo 105-8470, Japan