1. Division of Endocrinology and Metabolism, Tokyo Metropolitan Children’s Medical Center, Fuchu 183-8561, Japan
2. Clinical Research Support Center, Tokyo Metropolitan Children’s Medical Center, Fuchu 183-8561, Japan
3. Department of Gynecology, Yokohama City University Medical Center, Yokohama 232-0024, Japan
4. Department of Pediatrics, Oita University Faculty of Medicine, Oita 879-5593, Japan
5. Department of Bone and Mineral Research, Research Institute, Osaka Women’s and Children’s Hospital, Izumi 594-1101, Japan
6. Department of Pediatrics, Tama-Hokubu Medical Center, Tokyo 189-8511, Japan