1. Division of Diabetes and Endocrinology, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan
2. Department of Diagnostic Pathology, Kobe University Hospital, Kobe 650-0017, Japan
3. Division of Diabetes and Endocrinology, Kobe University Hospital, Kobe 650-0017, Japan
4. Division of Urology, Department of Organ Therapeutics, Faculty of Medicine, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan