1. Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Fukushima, Japan
2. Department of Surgery, Minamisoma Municipal General Hospital, Fukushima, Japan
3. Department of Head and Neck Surgery and Otolaryngology, Asahi University Hospital, Gifu, Japan
4. Department of Thyroid and Endocrinology, Fukushima Medical University School of Medicine, Fukushima, Japan
5. Department of Laboratory Medicine, Fukushima Medical University School of Medicine, Fukushima, Japan
6. Department of Thyroid Therapeutic Surgery, Fukushima Medical University, Fukushima, Japan
7. Thyroid and Endocrine Center, Fukushima Global Medical Science Center, Fukushima Medical University, Fukushima, Japan