1. Department of Endocrinology and Metabolism, Niigata Medical Center, Japan
2. Department of Hematology, Endocrinology and Metabolism, Niigata University Faculty of Medicine, Japan
3. Department of Neurology, Niigata Medical Center, Japan
4. Department of Orthopedic Surgery, Niigata Medical Center, Japan
5. Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Japan
6. Center of Diabetes, Endocrinology and Metabolism, Joetsu General Hospital, Japan