1. Division of Diabetes, Metabolism, and Endocrinology, Department of Internal Medicine, Showa University School of Medicine, Tokyo, Japan.
2. Department of Pharmacogenomics, Showa University School of Pharmacy, Tokyo, Japan.
3. Division of Endocrinology and Metabolism, Showa University Fujigaoka Hospital, Yokohama, Kanagawa, Japan.
4. Ban Thyroid Clinic, Tokyo, Japan.