1. Department of Endocrinology, Metabolism, and Hypertension, Clinical Research Institute, National Hospital Organization Kyoto Medical Center, Kyoto 612-8555, Japan
2. Department of Pediatrics, National Hospital Organization Kyoto Medical Center, Kyoto 612-8555, Japan
3. Department of Obstetrics and Gynecology, National Hospital Organization Kyoto Medical Center, Kyoto 612-8555, Japan
4. Division of Endocrinology and Metabolism, National Hospital Organization Kyoto Medical Center, Kyoto 612-8555, Japan
5. Clinical Research Institute, National Hospital Organization Kyoto Medical Center, Kyoto 612-8555, Japan
6. Department of Preemptive Medicine and Metabolism, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8510, Japan