1. Thyroid Research Group, Japan Association of Breast and Thyroid Sonography, Third Department of Internal Medicine, University of Yamanashi, Yamanashi, Japan.
2. Faculty of Medicine and Bioinformatics Support Section, The Center for Life Science Research, University of Yamanashi, Yamanashi, Japan.
3. Thyroid Research Group, Japan Association of Breast and Thyroid Sonography, University of Yamanashi, Yamanashi, Japan.
4. Department of Surgery and Ultrasound Imaging, Ito Hospital, Tokyo, Japan.
5. Department of Surgery, Osaka City Sumiyoshi Hospital, Osaka, Japan.
6. Department of Surgery, Eiju General Hospital, Tokyo, Japan.
7. Department of Clinical Laboratory, Tokai University Hospital, Bouseidai, Kanagawa, Japan.
8. Department of Surgery, Kidukuri Center Hospital for Adult, Kidukuri, Aomori, Japan.
9. Department of Internal Medicine, Institute of Clinical Endocrinology, Tokyo Women's Medical University, Tokyo, Japan.
10. Department of Radiology, The Jikei University, Tokyo, Japan.
11. Department of Endocrine Surgery, Toranomon Hospital, Tokyo, Japan.
12. Department of Surgery II, Fukushima Medical University School of Medicine, 1 Hikarigaoka, Japan.
13. Department of Surgery, Institute of Clinical Endocrinology, Tokyo Women’s Medical University, Tokyo, Japan.
14. Department of Oncology, Institute of Geriatrics and Science, Osaka City University Graduate School of Medicine, Osaka, Japan.
15. Department of Endocrinology, Noguchi Thyroid Clinic and Hospital Foundation, Oita, Japan.
16. Department of Radiology, Institute of Clinical Medicine, University of Tsukuba, Ibaraki, Japan.
17. Department of Radiology, St Luke's International Hospital, Tokyo, Japan.
18. Department of Radiology, Cancer Institute Hospital, Tokyo, Japan.
19. Deptartment of Breast-Thyroid-Endocrine Surgery, Institute of Clinical Medicine, University of Tsukuba, Ibaraki, Japan.
20. Department of Surgery, Kuma Hospital, Hyogo, Japan.
21. Third Department of Internal Medicine, University of Yamanashi, Yamanashi, Japan.
22. Division of Endocrinology and Metabolism, Showa General Hospital, Tokyo, Japan.