1. Department of Thyroid and Endocrinology, School of Medicine, Fukushima Medical University, Japan
2. Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Japan
3. Department of Radiation Health Management, School of Medicine, Fukushima Medical University, Japan
4. Department of Laboratory Medicine, School of Medicine, Fukushima Medical University, Japan
5. Department of Epidemiology, School of Medicine, Fukushima Medical University, Japan