1 Department of Radiation Health Management, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan; Department of Internal Medicine, Soma Central Hospital, Soma, Japan. Electronic address: h.saito0515@gmail.com.
2 Department of Radiation Health Management, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan; Research Division, Medical Governance Research Institute, Tokyo, Japan.
3 Department of Radiation Health Management, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan.