1. Division of Endocrinology, Toranomon Hospital Endocrine Center, Tokyo 105-8470, Japan
2. Okinaka Memorial Institute for Medical Research, Tokyo 105-8470, Japan
3. Department of Pathology, Toranomon Hospital, Tokyo 105-8470, Japan
4. Clinical Research Institute, National Hospital Organization Kyoto Medical Center, Kyoto 612-8555, Japan
5. Division of Surgery, Toranomon Hospital Endocrine Center, Tokyo 105-8470, Japan