1. Department of Endocrinology and Metabolism Dokkyo Medical University Mibu, Tochigi Japan
2. Department of Infection Control and Clinical Laboratory Medicine Dokkyo Medical University Mibu Shimotsuga, Tochigi Japan
3. Center of Medical Ultrasonics Dokkyo Medical University Mibu Shimotsuga, Tochigi Japan
4. Division of Clinical Science Research Support Center Dokkyo Medical University Mibu Shimotsuga, Tochigi Japan
5. Department of Nephrology and Endocrinology The University of Tokyo Tokyo Japan