1. Department of Hematology, Endocrinology and Metabolism, Niigata University Faculty of Medicine, Niigata, Japan
2. Department of Endocrinology and Metabolism, Nagaoka Red Cross Hospital, Niigata, Japan
3. Department of Internal Medicine, Morikawa Clinic, Niigata, Japan
4. Department of Bioscience and Genetics, National Cerebral and Cardiovascular Center, Suita, Japan
5. Department of Cardiovascular Biology and Medicine, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan