1. Department of Endocrinology and Metabolism, National Hospital Organization Kyoto Medical Center, Kyoto 612-8555, Japan
2. Department of Endocrinology, Metabolism, and Hypertension Research, Clinical Research Institute, National Hospital Organization Kyoto Medical Center, Kyoto 612-8555, Japan
3. Clinical Research Institute, National Hospital Organization Kyoto Medical Center, Kyoto 612-8555, Japan