1. Department of Metabolic Medicine, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
2. Department of Legal Medicine, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
3. Center of Diabetes, Endocrinology and Metabolism, Toho University Sakura Medical Center, Chiba 285-8741, Japan
4. Clinical Laboratory Program, Faculty of Science, Toho University, Chiba 274-8510, Japan
5. Department of Clinical-Laboratory and Experimental-Research Medicine, Toho University Sakura Medical Center, Chiba 285-8741, Japan
6. Department of Cardiovascular Medicine, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan