1. Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Fukushima City, Japan.
2. Division of Internal Medicine, Department of Thyroid and Endocrinology, Fukushima Medical University Hospital, Fukushima City, Japan.
3. Department of Thyroid and Endocrinology, School of Medicine, Fukushima Medical University, Fukushima City, Japan.
4. Department of Surgery, Minamisoma Municipal General Hospital, Fukushima, Japan.
5. Department of Otolaryngology, School of Medicine, Asahi University, Mizuho, Japan.
6. Department of Laboratory Medicine, School of Medicine, Fukushima Medical University, Fukushima, Japan.
7. Department of Epidemiology, School of Medicine, Fukushima Medical University, Fukushima, Japan.
8. Department of Thyroid Therapeutic Surgery, Fukushima Medical University, Fukushima, Japan.
9. Department of Public Health, School of Medicine, Fukushima Medical University, Fukushima, Japan.
10. Thyroid and Endocrine Center, Fukushima Global Medical Science Center, Fukushima Medical University, Fukushima, Japan.
11. Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan.