1. Department of Diabetes, Endocrinology and Nutrition, Kyoto University Graduate School of Medicine , Kyoto , Japan
2. Sugawa Clinic , Kyoto , Japan
3. Medical Research Support Center, Kyoto University Graduate School of Medicine , Kyoto , Japan
4. Metabolism and Endocrinology Division of Internal Medicine, Kishiwada City Hospital , Osaka , Japan
5. Department of Pathology and Biology of Diseases, Kyoto University Graduate School of Medicine , Kyoto , Japan
6. Clinical Research Center, National Hospital Organization Kyoto Medical Center , Kyoto , Japan