1. Division of Endocrinology and Metabolism, Department of Internal Medicine, Gunma University Graduate School of Medicine, Maebashi 371-8511, Japan
2. Department of Breast and Endocrine Surgery, Tokyo Women’s Medical University, Tokyo 162-8666, Japan
3. Sapporo Thyroid Clinic (Ito Hospital), Sapporo 060-0042, Japan
4. Diabetes & Thyroid Clinic, Sakura Chuo Hospital, Sakura 285-0014, Japan
5. Department of Internal Medicine, Kuma Hospital, Kobe 650-0011, Japan
6. Department of Nephrology and Endocrinology, Graduate School of Medicine, The University of Tokyo, Tokyo 113-8655, Japan
7. Department of Laboratory Medicine, Fukushima Medical University, Fukushima 960-1295, Japan
8. Department of Surgery, Yamashita Thyroid Hospital, Fukuoka 812-0034, Japan
9. Department of Thyroid and Endocrinology, Division of Internal Medicine, Fukushima Medical University Hospital, Fukushima 960-1295, Japan
10. Department of Molecular Diagnosis, Graduate school of Medicine, Chiba University, Chiba 260-8670, Japan
11. Third Department of Internal Medicine, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Yamanashi 409-3998, Japan
12. Department of Otorhinolaryngology, Juntendo University Faculty of Medicine, Tokyo 113-8421, Japan
13. Department of Radiation Medical Sciences, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki 852-8523, Japan
14. Department of Internal Medicine, Miyakawa Hospital, Kawasaki 210-0802, Japan
15. Thyroid and Endocrine Center, Fukushima Medical University, Fukushima 960-1295, Japan
16. Department of Endocrine Surgery, Nippon Medical School Graduate School of Medicine, Tokyo 113-8603, Japan