1. Division of Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago 683-8504, Japan
2. Center for Diabetes, Endocrinology and Metabolism, Shizuoka Prefectural Hospital, Shizuoka 420-8527, Japan
3. Division of Urology, Tottori University Faculty of Medicine, Yonago 683-8504, Japan
4. Division of Pathology, Tottori University Faculty of Medicine, Yonago 683-8504, Japan
5. Research Support Center, Shizuoka Prefectural Hospital, Shizuoka 420-8527, Japan