1. Division of Endocrinology and Metabolism, Department of Internal Medicine, Showa University Fujigaoka Hospital, Yokohama, Kanagawa, Japan.
2. Division of Diabetes, Metabolism, and Endocrinology, Department of Internal Medicine, School of Medicine, Showa University, Tokyo, Japan.
3. Department of Pharmacogenomics, School of Pharmaceutical Science, Showa University, Tokyo, Japan.